Wenhao YuChongqing University | CQU
Wenhao Yu
Doctor of Engineering
About
31
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Introduction
Spent lithium-ion battery recovery, life cycle assessment
Publications
Publications (31)
With increasing the market share of electric vehicles (EVs), the rechargeable lithium-ion batteries (LIBs) as the critical energy power sources have experienced rapid growth in the last decade, and the massive LIBs will be retired after the service life of EVs. To dispose of retired LIBs, the comprehensive recycling including echelon utilization an...
Spent Li-ion battery (LIB) recycling has become a challenge with the rapidly developing electric vehicle (EV) industry. To address the problems of high cost and low recovery of Li in the recycling of spent LIBs using traditional hydrometallurgical processes, we developed an alkali metal catalytic carbothermic reduction method to recover spent LiNix...
A one-step spray pyrolysis process is investigated for the first time in the field of spent lead-acid batteries (LABs) recycling. The spent lead paste that derived from spent LAB is desulfurized and then leached to generate the lead acetate (Pb(Ac)2) solution, which is then sprayed directly into a tube furnace to prepare the lead oxide (PbO) produc...
The current hydrometallurgical recovery routes of spent lead paste generate a large amount of acid/alkali residual filtrate, bringing significant technical and environmental challenge. In this study, the low-impurity lead acetate solution was prepared by reacting desulfurized paste with acetic acid (HAc), which then reacted with citric acid to synt...
In China, the high demand for electric vehicles (EVs) has led to a rapid increase in power lithium-ion battery (LIB) production, which has subsequently given rise to an explosive increase in the number of spent power LIBs. Comprehensive recycling, including recovery and reuse, is a promising development direction to obtain the maximum utilization o...
Hybrid organic-inorganic perovskite is a class of emerging materials with promising application prospects in optoelectronics. However, the consumption of lead resources and poor stability in moisture environment have limited their practical applications. Herein, a family of air-stable two-dimensional (2D) hybrid organic-inorganic perovskite crystal...
Novel leady oxides with different particle sizes are prepared via pyrolysis of lead citrate in rotary kiln and subsequent ball-milling. The mechanism of how particle size influences the phase transition route of novel leady oxides during soaking process is investigated. PbO with larger particle size (D50 diameter = 22.4 μm) is converted to 3PbO∙PbS...
Hydrometallurgical process for recovery of spent lead-acid battery paste shows great advantages in reducing SO2 and lead particulates emissions than traditional pyrometallurgical process. However, the hydrometallurgical process usually has drawbacks of high consumption of chemical reagents and difficulty in removing impurities (especially Fe and Ba...
A facile one-pot solvothermal method was applied to synthesize a magnetic biochar composite (MB) using phoenix tree leaves-derived biochar as the carbon matrix. The structure of MB was optimized by varying the load ratio and particle size of Fe3O4 nanoparticles on biochar. Time-dependent structure and composition evolution of solid and liquid phase...
Leady oxide samples with various Fe contents were recovered from simulated spent lead paste with the addition of various dosages of iron oxides as simulated Fe impurities via hydrometallurgical process with sodium citrate-acetic acid solution. More than 75 wt% of the Fe element in simulated spent lead paste remained in the recovered leady oxide. Th...
Novel [email protected] composite is synthesized through an optimized mechano-chemical method and used as negative active materials for enhanced performance of lead-carbon battery. Mechanical ball-milling of solid lead acetate, sodium hydroxide and carbon additives (Vulcan-72) would generate uniform composite of lead oxide and carbon ([email protec...
BACKGROUND
The lead oxide product recovered from spent lead‐acid battery paste via the hydrometallurgical route usually contains many impurity elements, i.e. Ba and Fe. In this paper, a facile lead acetate conversion process was proposed for synthesis of high‐purity alpha‐lead oxide (α‐PbO) derived from spent lead‐acid batteries.
RESULTS
The desul...
To elucidate the deterioration mechanism of valve regulated lead-acid battery (VRLA) under high-rate partial-state-of-charge (HRPSoC) duty, the cyclic performance and the direct-current internal resistance (DCIR) of VRLA with addition of a granular carbon additive, (Vulcan 72, VC 72) in the negative active materials (NAMs) are investigated specific...
Lead-carbon batteries could provide better performance on high-rate partial-state-of-charge (HRPSoC) cycles than lead-acid batteries (LABs), making them promising for the new-generation of hybrid electric vehicles. The addition of carbon allotropes to the negative active material (NAM) could induce a significant improvement to the battery performan...
In article number 1705294, Jiakuan Yang and co-workers develop an environmentally friendly strategy to prepare a lead oxide and carbon (PbO@C) composite by pyrolyzing lead citrate precursors recycled from discarded lead-acid batteries. The 3D electroosmotic pump effect and intimate bonding of this PbO@C composite improve the performance and lifetim...
The tetrabasic lead sulfate (4BS) additive, a high-value product, is synthesized directly from the starting materials of the spent lead paste in recycled lead-acid battery via a hydrometallurgical route. The synthesized 4BS products with two different particle size distributions are referred to as the Sintered 4BS and Ball-milled 4BS, with the mean...
This article reviews recent studies on the recycling of spent lead paste and describes novel technologies. Although the pyrometallurgical process has been dominant in the secondary lead recycling processes, there has been growing pressure to achieve sustainable greener recycling methods to address the environmental pollution issues caused by emissi...
Electrodeposition and electrodissolution reactions of the Pb2+/Pb electrode were studied on a glassy carbon rotating disk electrode in aqueous solutions of CH3SO3H and Pb(CH3SO3)2. The electrolytic parameters, kinematic viscosity and ionic conductivity, were determined with various concentrations of CH3SO3H and Pb(CH3SO3)2. The diffusion coefficien...
The effect of pH was investigated in a hydrometallurgical method for recycling spent lead-acid batteries with citric acid. The pH in this novel procedure was adjusted with a cheap and conveniently available alkalescent reagent-ammonia. The desulphurization efficiency of spent lead paste could be increased dramatically up to 99 wt% at a weaker acidi...
The recycling industry from spent lead acid batteries is a typical case of resource recycling with a higher recovery ratio. The pyrometallurgical process still dominates in the secondary lead recycling industry. However, due to the co-existence of recovery technologies with different technical levels and shortage of effective regulatory enforcement...
Background
Lead citrate is an attractive precursor in the preparation of ultrafine leady oxide from the paste in spent lead-acid battery through a novel hydrometallurgical process, since the recovered lead oxide could be recycled in this way for the production of new lead acid batteries.ResultsTwo different metal organic complexes were synthesized...