首页|Bifunctional additive phenyl vinyl sulfone for boosting cyclability of lithium metal batteries
Bifunctional additive phenyl vinyl sulfone for boosting cyclability of lithium metal batteries
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One of the bottlenecks limiting the cycling stability of high voltage lithium metal batteries(LMBs)is the lack of suitable electrolytes.Herein,phenyl vinyl sulfone(PVS)is proposed as a multifunctional additive to stabilize both cathode and anode interfaces as it can be preferentially oxidized/reduced on the electrode surfaces.The PVS derived solid electrolyte interphase films can not only reduce the transition metal dissolution on the cathode side,but also suppress the Li dendrite spread on the lithium anode side.The Li‖Li symmetric battery with PVS addition delivers longer cycle life and a higher critical current density of over 3.0 mAh cm-2.The LiNi0.8Co0.1Mn0.1O2(NCM811)‖Li full cell exhibits excellent capacity retention of 80.8％or 80.0％after 400 cycles at 0.5 C or 1 C rate with the voltage range of 3.0-4.3 V.In particular,the NCM811‖Li cell under constrained conditions remains operation over 150 cycles.This work offers new insights into the electrolyte formulations for the next generation of LMBs.
Lithium metal batteryNi-rich cathodePhenyl vinyl sulfoneDendrite
Shaanxi Key Laboratory of Energy Chemical Process Intensification,School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an,710049,China
CAS Key Laboratory of Green Process and Engineering,Beijing Key Laboratory of Ionic Liquids Clean Process,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
Faculty of Engineering and Physical Sciences,Department of Chemical and Process Engineering,University of Surrey,Guildford,GU2 7XH,UK
National Key Research and Development Program of ChinaScience Fund for Creative Research Groups of the National Natural Science Foundation of China
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NSTL
万方数据
维普
