Jun Chen

• PhD
• Karlsruhe Institute of Technology

Covalent organic frameworks (COFs) have been regarded as promising cathode materials for lithium batteries. However, they generally show low practical capacity. Here, the design, preparation, and battery application of a highly crystalline 2D truxenone‐based COF (TRO‐BT‐COF) with rich redox active sites, realizing a high practical capacity is repor...

Covalent organic frameworks (COFs) have been regarded as promising cathode materials for lithium batteries. However, they generally show low practical capacity. Here we report the design, preparation, and battery application of a highly crystalline two‐dimensional truxenone‐based COF (TRO‐BT‐COF) with rich redox active sites, realizing a high pract...

Raman spectra play an important role in characterizing two-dimensional materials, as they provide a direct link between the atomic structure and the spectral features. In this work, we present an automatic computational workflow for Raman spectra using all-electron density functional perturbation theory. Utilizing this workflow, we have successfull...

Aqueous nickel‐organic batteries have the potential for grid‐scale energy storage due to their high safety and sustainability merits. However, organic anodes generally store charge by coordinating with alkaline metal cations, which could cause electrolyte consumption. Here, azobenzene (AZO) is screened out from carbonyl, imine, and azo compounds to...

Ultrasmall CsPbI3 perovskite quantum dots (QDs) are the most promising candidates for realizing efficient and stable pure-red perovskite light-emitting diodes (PeLEDs)1, 2, 3, 4–5. However, it is challenging for ultrasmall CsPbI3 QDs to retain their solution-phase properties when they assemble into conductive films, greatly hindering their device a...

Layered manganese‐rich oxides (LMROs) are widely recognized as the leading cathode candidates for grid‐scale sodium‐ion batteries (SIBs) owing to their high specific capacities and cost benefits, but the notorious Jahn‐Teller (J‐T) distortion of Mn³⁺ always induces severe structural degradation and consequent rapid cathode failure, impeding the pra...

Mountain building, alongside the associated erosion and weathering, plays a key role in mediating the long‐term carbon cycle, thus impacting Earth’s climate. Certain processes, such as the weathering of petrogenic organic carbon (OCpetro), still lack comprehensive quantitative research owing to the interference of human activities, hindering a full...

The response of the East Asian summer monsoon (EASM) precipitation to Pleistocene global cooling is crucial for understanding Earth's climate and hydrological cycles. The long‐term trend of the EASM precipitation during the Pleistocene remains hotly debated with two main hypotheses: one suggesting a gradually weakening EASM driven by global cooling...

Dielectric energy storage capacitors are indispensable components in advanced electronic and electrical systems. Excellent performance requires the dielectric materials possessing low residual polarization (Pr), high breakdown strength (Eb), and large maximum polarization (Pm). The first two parameters can be typically achieved through chemical reg...

Enhanced silicate weathering (ESW) is a geoengineering method aimed at accelerating carbon dioxide (CO2) removal (CDR) from atmosphere by increasing the weathering flux of silicate rocks and minerals. It has emerged as a promising strategy for CDR. Theoretical studies underscore ESW’s substantial potential for CDR and its diverse benefits for crops...

Layered manganese‐rich oxides (LMROs) are widely recognized as the leading cathode candidates for grid‐scale sodium‐ion batteries (SIBs) owing to their high specific capacities and cost benefits, but the notorious Jahn‐Teller (J‐T) distortion of Mn3+ always induces severe structural degradation and consequent rapid cathode failure, impeding the pra...

The high-entropy strategy has emerged as a prevalent approach to boost capacitive energy-storage performance of relaxors for advanced electrical and electronic systems. However, exploring high-performance high-entropy systems poses challenges due to the extensive compositional space. Herein, with the assistance of machine learning screening, we dem...

All‐solid‐state polymer electrolytes are promising for lithium batteries, but Li⁺ transport in these electrolytes relies on amorphous chain segment movement, leading to low Li⁺ mobility and poor mechanical strength. Here we propose a novel Li⁺ transport mechanism mediated by PEO3:LiBF4 nanocrystals (NCPB) with the aggregate (AGG) anionic structure,...

Dielectric energy storage capacitors are indispensable components in advanced electronic and electrical systems. Excellent performance requires the dielectric materials possessing low residual polarization (Pr), high breakdown strength (Eb), and large maximum polarization (Pm). The first two parameters can be typically achieved through chemical reg...

All‐solid‐state polymer electrolytes are promising for lithium batteries, but Li+ transport in these electrolytes relies on amorphous chain segment movement, leading to low Li+ mobility and poor mechanical strength. Here we propose a novel Li+ transport mechanism mediated by PEO3:LiBF4 nanocrystals (NCPB) with the aggregate (AGG) anionic structure,...

Aqueous proton batteries (APBs) have attracted increasing interest owing to their potential for grid‐scale energy storage with extraordinary sustainability and excellent rate abilities. However, there are limited anode materials and it remains a great challenge to effectively balance capacity and cycling performance. Here, we report a covalent orga...

Pb‐free dielectric energy storage capacitors are core components in advanced pulse‐power electronic systems and devices. However, the relatively low energy density (Wrec) for the industrial pillar BaTiO3 (BT)‐based capacitors remains a significant obstacle for their cutting‐edge applications, due to their low intrinsic polarization and breakdown st...

Sodium‐ion batteries are applied to cold‐resistant energy storage hindered by phase transitions and sluggish Na ⁺ migration of traditional carbonate‐based electrolytes at low temperatures. The desolvation of Na ⁺ is a crucial step in impeding the transport of Na ⁺ , which primarily attributes to the robust solvent coordination of Na ⁺ . Herein, a l...

Organic carbonyl electrode materials (OCEMs) have shown great promise for high-performance lithium batteries due to their high capacity, renewability, and environmental friendliness. Nevertheless, the severe dissolution of these materials in conventional electrolytes results in poor cycling stability, which hinders their practical application. Here...

Objectives GPC3 has been recognized as a promising target for immunotherapy in hepatocellular carcinoma (HCC). However, the GPC3-targeted immunotherapies have shown limited therapeutic efficacy. The use of anti-PD-1/PD-L1 monoclonal antibodies in HCC treatment is considerably constrained. Furthermore, there is still a notable lack of understanding...

Relaxor antiferroelectrics are considered promising candidate materials for achieving excellent energy storage capabilities. However, the trade-off between high recoverable energy density and high efficiency remains a major challenge in relaxor antiferroelectrics for practical applications. Herein, guided by phase-field simulation, we propose a str...

Aqueous proton batteries (APBs) have attracted increasing interest owing to their potential for grid‐scale energy storage with extraordinary sustainability and excellent rate abilities. However, there are limited anode materials and it remains a great challenge to effectively balance capacity and cycling performance. Here, we report a covalent orga...

Electric field induced antiferroelectric-ferroelectric phase transition is a double-edged sword for energy storage properties, which not only offers a congenital superiority with substantial energy storage density but also poses significant challenges such as large polarization hysteresis and poor efficiency, deteriorating the operation and service...

Atomic-scale ferroelectrics are of great interest for high-density electronics, particularly field-effect transistors, low-power logic, and nonvolatile memories. We devised a film with a layered structure of bismuth oxide that can stabilize the ferroelectric state down to 1 nanometer through samarium bondage. This film can be grown on a variety of...

Polymer electrolytes incorporated with fillers possess immense potential for constructing the fast and selective Li⁺ conduction. However, the inhomogeneous distribution of the fillers usually deteriorates the microdomain consistency of the electrolytes, resulting in uneven Li⁺ flux, and unstable electrode‐electrolyte interfaces. Herein, we formulat...

Rechargeable batteries employing Li metal anodes have gained increasing attention due to their high energy density. Nevertheless, low stability and reversibility of Li metal anodes severely impeded their practical applications. Designing current collectors (CCs) with reasonable structure and composition is an efficient approach to stabilizing the L...

Iron alloys, including steels and magnetic functional materials, are widely used in capital construction, manufacturing, electromagnetic technology, etc. However, they face the long-standing challenge of high coefficient of thermal expansion (CTE), limiting the applications in high-precision fields. This work proposes a strategy involving the in-si...

Ferromagnetic insulators are receiving ever-increasing research activities driven not only by the unique advantage of low power loss during spin-wave-based information processing but also by the potential to construct next-generation spintronic devices. However, either the exceedingly rare candidates or the low Curie temperature far below room temp...

Polymer electrolytes incorporated with fillers possess immense potential for constructing the fast and selective Li+ conduction. However, the inhomogeneous distribution of the fillers usually deteriorates the microdomain consistency of the electrolytes, resulting in uneven Li+ flux, and unstable electrode‐electrolyte interfaces. Herein, we formulat...

The incompatibility of the large piezoelectric response (d33) and high depolarization temperature (Td) in lead-free piezoelectric ceramics limited their practical applications. The most used modification methods for improving d33 or Td commonly required a delicate control of complex compositions. Here, a strategy for simply changing the sintering t...

Creating a heterostructure by combining two magnetically and structurally distinct ruthenium oxides is a crucial approach for investigating their emergent magnetic states and interactions. Previously, research has predominantly concentrated on the intrinsic properties of the ferromagnet SrRuO3 and recently discovered altermagnet RuO2 solely. Here,...

Strain engineering is an effective approach for modulating the activity of single‐atom catalysts, yet the underlying mechanisms are not fully understood. This review focuses on the strain effects on single‐atom catalysts, detailing the geometric structure distortion and electronic structure changes of the active sites with different strains. It als...

Silicate weathering acts as a significant carbon sink and sustains ecosystems by supplying essential elements, thus shaping Earth's habitability. However, our understanding the evolution of silicate weathering rates remains incomplete, with most knowledge focusing on rate decreases at solution‐silicate interfaces, while reactivity at fungi‐weathere...

Redox‐active organic compounds have received much attention as high‐capacity electrodes for rechargeable batteries. However, the high solubility in organic electrolytes during charge and discharge processes hinders the practical exploitation of organic compounds. This study presents a cobalt‐based metal–organic coordination compound with bifunction...

This study explored the clinical prognosis and lipidomics of hepatitis B virus steatohepatitic hepatocellular carcinoma (HBV-SHHCC) and aimed to identify a noninvasive and convenient method to diagnose this phenotype and guide treatment using MRI. A total of 433 HBV-infected HCC patients were enrolled in this retrospective study. Survival data were...

Creating a heterostructure by combining two magnetically and structurally distinct ruthenium oxides is a crucial approach for investigating their emergent magnetic states and interactions. Previously, research has predominantly concentrated on the intrinsic properties of the ferromagnet SrRuO3 and recently discovered altermagnet RuO2 solely. Here,...

Sulfurized polyacrylonitrile (SPAN) is recognized as a promising organic cathode for long‐lifespan lithium metal batteries. Nevertheless, the irreversible cleavage/formation of multiple sulfur‐sulfur (S−S) bonds of SPAN within conventional ether‐based electrolytes results in loss of active S species, severe capacity fading and shuttle effects. Here...

As indispensable energy-storage technology in modern society, batteries play a crucial role in diverse fields of 3C products, electric vehicles, and electrochemical energy storage. However, with the growing demand for future electrochemical energy devices, lithium-ion batteries as an existing advanced battery system face a series of significant cha...

Lithium‐ion batteries (LIBs) with conventional carbonate‐based electrolytes suffer from safety concerns in large‐scale applications. Phosphates feature high flame retardancy but are incompatible with graphite anode due to their inability to form a passivated solid electrolyte interphase (SEI). Herein, we report a monofluorinated co‐solvent, diethyl...

Dielectric capacitors harvest energy through an electrostatic storage process, which enables an ultrafast charging‐discharging rate and ultrahigh power density. However, achieving high energy density (Wrec) and efficiency (η) simultaneously, especially when preserving them across a wide frequency/temperature range or cycling numbers, remains challe...

A zinc (Zn) metal anode paired with a vanadium oxide (VOx) cathode is a promising system for aqueous Zn–ion batteries (AZIBs); however, side reactions proliferating on the Zn anode surface and the infinite dissolution of the VOx cathode destabilise the battery system. Here, we introduce a multi‐functional additive into the ZnSO4 (ZS) electrolyte, K...

Phosphate‐based localized high‐concentration electrolytes (LHCE) feature high flame retardant and satisfactory cathodic stability for lithium metal batteries. However, stable cycling of those electrolytes at ultra‐high upper cut‐off voltages for long‐term stability remains challenging. Herein, an ether‐modified phosphate, diethyl (2‐methoxy ethoxy)...

Sulfurized polyacrylonitrile (SPAN) is recognized as a promising organic cathode for long‐lifespan lithium metal batteries. Nevertheless, the irreversible cleavage/formation of multiple sulfur‐sulfur (S‐S) bonds of SPAN within conventional ether‐based electrolytes results in loss of active S species, severe capacity fading and shuttle effects. Here...

The composite gel electrolyte (CGE), which combines the advantages of inorganic solid‐state electrolytes and solid polymer electrolytes, is regarded as the ultimate candidate for constructing batteries with high safety and superior electrode‐electrolyte interface contact. However, the ubiquitous agglomeration of nanofillers results in low filler ut...

Designing spinel nanocrystals (NCs) with tailored structural composition and cation distribution is crucial for superior catalytic performance but remarkably challenging due to their intricate nature. Here, an aggregation growth restricted hot‐injection method is presented by meticulously investigating the fundamental nucleation and aggregation‐dri...

High‐performance dielectric energy‐storage ceramics are beneficial for electrostatic capacitors used in various electronic systems. However, the trade‐off between reversible polarizability and breakdown strength poses a significant challenge in simultaneously achieving high energy density and efficiency. Here a strategy is presented to address this...

Dielectric capacitors harvest energy through an electrostatic process, which enables an ultrafast charging‐discharging rate and ultrahigh power density. However, achieving high energy density (Wrec) and efficiency (η) simultaneously, especially when preserving them across a wide frequency/temperature range or cycling numbers, remains challenging. I...

Lithium‐ion batteries (LIBs) with conventional carbonate‐based electrolytes suffer from safety concerns in large‐scale applications. Phosphates feature high flame retardancy but are incompatible with graphite anode due to their inability to form a passivated solid electrolyte interphase (SEI). Herein, we report a monofluorinated co‐solvent, diethyl...

Aqueous nickel‐based batteries, particularly nickel‐organic batteries, are promising candidates for large‐scale energy storage applications owing to their environmental friendliness, abundant resources, and intrinsic safety. However, organic anode materials suffer from serious dissolution in electrolytes during discharge/charge processes and ampere...

FA1−xCsxPbI3 is a promising absorbent material for efficient and stable perovskite solar cells (PSCs)1,2. However, the most efficient α-FA1−xCsxPbI3 PSCs require the inclusion of the additive methylammonium chloride3,4, which generates volatile organic residues (methylammonium) that limit device stability at elevated temperatures⁵. Previously, the...

A zinc (Zn) metal anode paired with a vanadium oxide (VOx) cathode is a promising system for aqueous Zn–ion batteries (AZIBs); however, side reactions proliferating on the Zn anode surface and the infinite dissolution of the VOx cathode destabilise the battery system. Here, we introduce a multi‐functional additive into the ZnSO4 (ZS) electrolyte, K...

Sodium‐ion batteries (SIBs) as a promising technology for large‐scale energy storage have received unprecedented attention. However, the cathodes in SIBs generally suffer from detrimental cathode‐electrolyte interfacial side reactions and structural degradation during cycling, which leads to severe capacity fade and voltage decay. Here, we have dev...

Advancements and utilization of magnetic refrigeration technology hinge on the ongoing enhancement and optimization of magnetic refrigeration material properties. Nevertheless, the intricacy of the magnetocaloric effect (MCE) mechanism has emerged as a bottleneck, constraining the progress and refinement of magnetic refrigeration materials. In this...

Rapid advancements in electronic devices yield an urgent demand for high‐performance electronic packaging materials with high thermal conductivity, low thermal expansion, and great mechanical properties. However, it is a great challenge for current design philosophies to fulfill all the requirements simultaneously. Here, an effective strategy is pr...

Objective This study aimed to establish a uniform standard for the interpretation of HER2 gene and protein statuses in intrahepatic cholangiocarcinoma (ICC). We also intended to explore the clinical pathological characteristics, molecular features, RNA expression and immune microenvironment of HER2-positive ICC. Methods We analyzed a cohort of 304...

P2‐type layered Ni–Mn‐based oxides are vital cathode materials for sodium‐ion batteries (SIBs) due to their high discharge capacity and working voltage. However, they suffer from the detrimental P2 → O2 phase transition induced by the O²⁻−O²⁻ electrostatic repulsion upon high‐voltage charge, which leads to rapid capacity fade. Herein, we construct...

The continuous electrolyte decomposition and uncontrolled dendrite growth caused by the unstable solid electrolyte interphase (SEI) have largely hindered the development of Li metal batteries. Here, we demonstrate that tuning the facet of current collector can regulate the composition of SEI and the subsequent Li deposition behavior using single‐cr...

Electrolytes endowed with high oxidation/reduction interfacial stability, fast Li‐ion desolvation process and decent ionic conductivity over wide temperature region are known critical for low temperature and fast‐charging performance of energy‐dense batteries, yet these characteristics are rarely satisfied simultaneously. Here, we report anchored w...

Sodium‐ion batteries (SIBs) as a promising technology for large‐scale energy storage have received unprecedented attention. However, the cathodes in SIBs generally suffer from detrimental cathode‐electrolyte interfacial side reactions and structural degradation during cycling, which leads to severe capacity fade and voltage decay. Here, we have dev...

Cathode materials are the core components of lithium‐ion batteries owing to the determination of the practical voltage and effective energy of the battery system. However, advanced cathodes have faced challenges related to cation migration and cation intermixing. In this review, the study summarizes the structural failure mechanisms due to the cati...

The continuous electrolyte decomposition and uncontrolled dendrite growth caused by the unstable solid electrolyte interphase (SEI) have largely hindered the development of Li metal batteries. Here, we demonstrate that tuning the facet of current collector can regulate the composition of SEI and the subsequent Li deposition behavior using single‐cr...

Much effort is made to achieve the negative thermal expansion (NTE) control, but rare methods reached the improvement of intrinsic NTE. In the present work, a significantly enhanced NTE is realized in Cu2P2O7 by applying low pressure. Especially, the volumetric coefficient of thermal expansion (CTE) of Cu2P2O7 reached to −50.0 × 10⁻⁶ K⁻¹ (150–325K)...

Renewable energy‐driven proton exchange membrane water electrolyzer (PEMWE) attracts widespread attention as a zero‐emission and sustainable technology. Oxygen evolution reaction (OER) catalysts with sluggish OER kinetics and rapid deactivation are major obstacles to the widespread commercialization of PEMWE. To date, although various advanced elec...

Electrolytes endowed with high oxidation/reduction interfacial stability, fast Li‐ion desolvation process and decent ionic conductivity over wide temperature region are known critical for low temperature and fast‐charging performance of energy‐dense batteries, yet these characteristics are rarely satisfied simultaneously. Here, we report anchored w...

e14662 Background: Immune checkpoint inhibitor (ICI) combined with anti-angiogenic therapy is the standard first-line treatment for unresectable HCC patients. However, most patients do not derive durable benefit and will progress faster. Simultaneously, sufficient clinically validated biomarkers to stratify patients are lacking in HCC. Recent studi...