Optimizing Li Plating Behavior via Controlling Areal Capacity of a Cathode for Cycling Stability on 600 W h kg-1 Lithium-Metal Batteries

被引:2
作者
He, Yangcai [1 ,2 ]
Shi, Zhepu [2 ,3 ]
Liu, Meichen [2 ]
Li, Xiao [2 ]
Li, Ying [2 ]
Zhang, Jun [2 ]
Xu, Chang [2 ]
Qiu, Bao [2 ]
Liu, Zhaoping [2 ]
机构
[1] Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[3] Eastern Inst Technol, Eastern Inst Adv Study, Ningbo 315200, Peoples R China
基金
中国国家自然科学基金;
关键词
ultrahigh-energy batteries; lithium-metal anodes; high mass loading; lithium deposition; longcycling stability; ANODE; CHALLENGES;
D O I
10.1021/acsami.4c04859
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
To meet the requirements of long-range electric vehicles and aviation, the high-mass-loading electrode with high areal capacity is a promising solution to realize ultrahigh-energy lithium-metal batteries (LMBs). However, enabling the operation of high mass loading with a long cycling life is still a challenge without in-depth investigation. Herein, we figured out that the polarization appearing in the cycled lithium-metal anodes (LMAs) is responsible for the poor cycling of LMBs with high mass loading. Moreover, the origin of fast degradation of LMAs is affected by mass loading through the Li plating process, which is decided by the Li plating morphology. Hence, manipulating the mass loading can directly promote lithium reversibility and further mitigate cell polarization in LMBs, endowing high-mass-loading LMBs with excellent cycling stability. Consequently, we achieved an ultrahigh energy density (605 W h kg(-1)) of a 10.1 A h pouch cell with an excellent retention of 91.7% capacity and 86% energy after 50 cycles. The feasible strategy points out a promising approach for designing high-energy-density LMBs in the future.
引用
收藏
页码:33475 / 33484
页数:10
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