电容器
阳极
锂(药物)
内阻
材料科学
储能
电压
电极
计算机科学
电气工程
电池(电)
化学
工程类
功率(物理)
物理
内分泌学
物理化学
医学
量子力学
作者
Xianzhong Sun,Penglei Wang,Yabin An,Xiong Zhang,Shuilin Zheng,Kai Wang,Yanwei Ma
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-11-01
卷期号:168 (11): 110540-110540
被引量:10
标识
DOI:10.1149/1945-7111/ac38f7
摘要
Lithium-ion capacitors (LICs) bridge the gap between lithium-ion batteries (LIBs) and electrical double-layer capacitors (EDLCs) owing to their unique energy storage mechanisms. From the viewpoints of electrode materials and cell design, the pre-lithiation process is indispensable for improving the working voltage and energy density of LICs. However, the conventional physical short-circuit (PSC) method is time-consuming, which limits the mass-production of practical large-capacity LIC cells. Three alternative pre-lithiation protocols have been proposed, combining the PSC protocol and electrochemical approaches to shorten the pre-lithiation time. The prototype LIC pre-lithiated by using the open-circuit potential cycling (OPC) protocol has the lowest internal resistance and superior high-rate capability (even at 200C-rate). The 900-F large-capacity laminated LIC cells have been assembled and pre-lithiated to validate the feasibility of this method. The pre-lithiation time has been reduced from 470 h (PSC protocol) to 19 h (OPC protocol). This combined protocol is presumed to counteract the voltage loss and enhance the Li + ion diffusion between multiple anode electrodes during the pre-lithiation process.
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