首页|Regulating the non-effective carriers transport for high-performance lithium metal batteries

Regulating the non-effective carriers transport for high-performance lithium metal batteries

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The absence of control over carriers transport during electrochemical cycling,accompanied by the dete-rioration of the solid electrolyte interphase(SEI)and the growth of lithium dendrites,has hindered the development of lithium metal batteries.Herein,a separator complexion consisting of polyacrylonitrile(PAN)nanofiber and MIL-101(Cr)particles prepared by electrospinning is proposed to bind the anions from the electrolyte utilizing abundant effective open metal sites in the MIL-101(Cr)particles to modu-late the transport of non-effective carriers.The binding effect of the PANM separator promotes uniform lithium metal deposition and enhances the stability of the SEI layer and long cycling stability of ultra-high nickel layered oxide cathodes.Taking PANM as the Li||NCM96 separator enables high-voltage cycling stability,maintaining 72％capacity retention after 800 cycles at a charging and discharging rate of 0.2 C at a cut-off voltage of 4.5 V and 0 ℃.Meanwhile,the excellent high-rate performance delivers a specific capacity of 156.3 mA h g-1 at 10 C.In addition,outstanding cycling performance is realized from-20 to 60 ℃.The separator engineering facilitates the electrochemical performance of lithium metal bat-teries and enlightens a facile and promising strategy to develop fast charge/discharge over a wide range of temperatures.

Functional separatorsMetal-organic frameworks3D continuous ion transport networksElectrospinningLithium metal batteries

Simeng Wang、Youchun Yu、Shaotong Fu、Hongtao Li、Jiajia Huang

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Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

Haike Group Research Institute of Innovation & Technology,Dongying 257000,Shangdong,China

National Key Research and Development Program of ChinaIPE Talent Startup Program of Institute of Process Engineering of Chinese Academy of Sciences

2021YFB2400300E0293507

2024

10.1016/j.jechem.2024.01.039

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.92(5)