材料科学
磷酸铁锂
锂(药物)
锂钴氧化物
阳极
涂层
电极
氧化钴
阴极
电池(电)
锂离子电池
电化学
化学工程
钴
复合材料
冶金
化学
功率(物理)
物理化学
内分泌学
工程类
物理
医学
量子力学
作者
Zhiming Liang,Tianyi Li,Holden Chi,Joseph M. Ziegelbauer,Kai Sun,Ming Wang,Wei Zhang,Tuo Liu,Yang‐Tse Cheng,Zonghai Chen,X. Q. Gayden,Chunmei Ban
出处
期刊:Energy & environmental materials
日期:2023-02-07
卷期号:7 (1)
被引量:3
摘要
Slurry casting has been used to fabricate lithium‐ion battery electrodes for decades, which involves toxic and expensive organic solvents followed by high‐cost vacuum drying and electrode calendering. This work presents a new manufacturing method using a nonthermal plasma to create inter‐particle binding without using any polymeric binding materials, enabling solvent‐free manufacturing electrodes with any electrochemistry of choice. The cold‐plasma‐coating technique enables fabricating electrodes with thickness (>200 μm), high mass loading (>30 mg cm −2 ), high peel strength, and the ability to print lithium‐ion batteries in an arbitrary geometry. This crosscutting, chemistry agnostic, platform technology would increase energy density, eliminate the use of solvents, vacuum drying, and calendering processes during production, and reduce manufacturing cost for current and future cell designs. Here, lithium iron phosphate and lithium cobalt oxide were used as examples to demonstrate the efficacy of the cold‐plasma‐coating technique. It is found that the mechanical peel strength of cold‐plasma‐coating‐manufactured lithium iron phosphate is over an order of magnitude higher than that of slurry‐casted lithium iron phosphate electrodes. Full cells assembled with a graphite anode and the cold‐plasma‐coating‐lithium iron phosphate cathode offer highly reversible cycling performance with a capacity retention of 81.6% over 500 cycles. For the highly conductive cathode material lithium cobalt oxide, an areal capacity of 4.2 mAh cm −2 at 0.2 C is attained. We anticipate that this new, highly scalable manufacturing technique will redefine global lithium‐ion battery manufacturing providing significantly reduced plant footprints and material costs.
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