Lixin Qiao

Qingdao Institute of Bioenergy and Bioprocess Technolog · Qingdao Industrial Energy Storage Research Institute

Polymer electrolytes (PEs) with excellent flexibility, processability, and good contact with lithium metal (Li°) anodes have attracted substantial attention in both academic and industrial settings. However, conventional poly(ethylene oxide) (PEO)-based PEs suffer from a low lithium-ion transference number (TLi+), leading to a notorious concentrati...

Rechargeable lithium metal (Li0) batteries (RLMBs) are considered attractive for improving Li-ion batteries. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) has been extensively used as a conducting salt for RLMBs due to its advantageous stability and innocuity. However, LiTFSI-based electrolytes are corrosive towards aluminium (Al0) current co...

Li-S batteries, as the most promising post Li-ion technology, have been intensively investigated for more than a decade. Although most previous studies have focused on liquid systems, solid electrolytes, particularly all-solid-state polymer electrolytes (ASSPEs) and quasi-solid-state polymer electrolyte (QSSPEs), are appealing for Li-S cells due to...

Li-S batteries, as the most promising post Li-ion technology, have been intensively investigated for more than a decade. Although most previous studies have focused on liquid systems, solid electrolytes, particularly all-solid-state polymer electrolytes (ASSPEs) and quasi-solid-state polymer electrolyte (QSSPEs), are appealing for Li-S cells due to...

Lithium–sulfur batteries are attracting extensive attention for energy storage owing to their high theoretical energy density. However, their practical implementation is hindered because of inherent issues of the technology such as the shuttling effect of the polysulfide intermediates and the formation of dendritic lithium metal (Li⁰) deposits duri...

The ion interactions in two novel ionic liquids containing the asymmetric sulfonimide anion, (difluoromethanesulfonyl)(trifluoromethanesulfonyl)imide (DFTFSI), are investigated using ¹H–¹⁹F Heteronuclear Overhauser Effect Spectroscopy (HOESY) nuclear magnetic resonance (NMR) in combination with relaxation measurements, and molecular dynamics (MD) s...

Introducing a small dose of electrolyte additive in solid polymer electrolytes (SPEs) is an appealing strategy for improving the quality of solid-electrolyte-interphase (SEI) layer formed on lithium metal (Li°) anode, thereby extending the cycling life of solid-state lithium metal batteries (SSLMBs). In this work, we report a new type of SPEs compr...

With the blooming of energy storage systems in e-mobility applications, the research activities of rechargeable lithium metal (Li°) batteries (LMBs) using solid-state electrolytes have been rekindled in recent years in light of stringent demands in terms of safety and energy density which are far beyond the capability of the contemporary lithium-io...

Solid‐state lithium metal (Li°) batteries (SSLMBs) are believed to be the most promising technologies to tackle the safety concerns and the insufficient energy density encountered in conventional Li‐ion batteries. Solid polymer electrolytes (SPEs) inherently own good processability and flexibility, enabling large‐scale preparation of SSLMBs. To min...

A novel single lithium‐ion conducting (SLIC) polymer electrolyte containing a weakly coordinating fluorine‐free polysalt is presented. The polysalt, lithium poly(4‐styrenesulfonyl)(dicyano)methide (LiPSDM), is conceived on the basis of a fluorine‐free green chemistry, and motivated by the highly performing non‐fluorinated lithium tricyanomethanide...

With higher nature abundance and lower production cost of sodium-based materials compared to lithium-based ones, sodium batteries have been arising as one of the most promising energy storage systems serving as complementary power sources to the popular lithium-ion batteries. Replacing conventional liquid electrolytes containing flammable liquid so...

In general, solid polymer electrolyte suffers from relatively low ionic conductivity and inferior oxidation stability. Herein, these issues can be effectively addressed by a supramolecular strategy based on the intermolecular interaction between a novel amorphous comb polymer of poly[propylene oxide-co-2-(2-methoxyethoxy)ethyl glycidyl ether] [P(PO...

Der Einfang negativer Ladungen in Polymerelektrolyten mit einem froschförmigen, Ether‐funktionalisierten Anion (EFA) wird von H. Zhang, J. Carrasco, M. Armand et al. in ihrer Zuschrift (DOI: 10.1002/ange.201905794) vorgestellt. Das Bis(trifluormethansulfonyl)imid‐Anion (TFSI), hier als Kaulquappe gezeigt, ist in einer Poly(ethylenoxid)‐Matrix (PEO)...

Trapping negative charges in polymer electrolytes using a frog‐shaped, ether‐functionalized anion (EFA) is presented by H. Zhang, J. Carrasco, M. Armand and co‐workers in their Communication (DOI: 10.1002/anie.201905794). The bis(trifluoromethanesulfonyl)imide anion (TFSI), shown as a slippery tadpole, is highly mobile in poly(ethylene oxide) (PEO)...

Suppressing the mobility of anionic species in polymer electrolytes (PEs) is essential for mitigating the concentration gradient and internal cell polarization, and thereby improving the stability and cycle life of rechargeable alkali metal batteries. Herein, we propose an ether‐functionalized anion (EFA−) as novel counter‐charge in a lithium salt....

Die richtige Gegenladung: Ein Ether‐funktionalisiertes Anion (EFA) als Gegenladung zu einem Lithiumion erreicht ein niedriges anionisches Diffusionsvermögen, aber ausreichende Li‐Ionen‐Leitfähigkeit in einem Polymer‐Elektrolyten. Diese Eigenschaft ist sehr begehrt für Hochleistungs‐Festkörper‐Lithiumbatterien. Abstract Suppressing the mobility of...

In light of the exciting progress that has been made at the molecular level for the design of organic electrodes in the last 30 years, as well as the inherent advantages of organic batteries, an in-depth energy density assessment is urgently needed to address the technological feasibility of organic batteries. Herein, we report a comprehensive anal...

Highly reductive magnesium borohydride (Mg(BH4)2) is compatible with metallic Mg, making it a promising Mg-ion electrolyte for rechargeable Mg batteries. However, pure Mg(BH4)2 in ether-based solutions displays very limited solubility (0.01 M), low oxidative stability (<1.8 V vs. Mg), and nucleophilic characteristic, all of which precludes its prac...

A new salt of lithium trifluoro(perfluoro-tert-butyloxyl)borate (LiTFPFB) which possesses bulky fluoroalkoxyl functional group in borate anion has been synthesized for high energy lithium metal batteries. The presence of bulky fluoroalkoxyl group in borate anion of LiTFPFB can facilitate ion dissociation and in situ generate a protective film on th...

Due to its high theoretical energy density (2600 Wh kg −1), low cost, and environmental benignity, the lithium-sulfur (Li-S) battery is attracting strong interest among the various electrochemical energy storage systems. However, its practical application is seriously hampered by the so-called shuttle effect of the highly soluble polysulfides. Here...

Two-electron transfer chemisty based on earth-abundant Mg and S offer great possibilities of delivering higher energy density than current Li-ion technology. Developing non-nucleophilic electrolytes that reversibly and efficiently plate/strip Mg is believed to be a major obstacle for implementing such divalent battery technologies. In this work, we...

Developing high-voltage Mg-compatible electrolytes (>3.0 V vs Mg) still remains to be the biggest R&D challenge in the area of nonaqueous rechargeable Mg batteries. Here, the key design concepts toward exploring new boron-based Mg salts in a specific way of highlighting the implications of anions are proposed for the first time. The well-defined bo...