Solvent-Free Manufacturing of Lithium-Ion Battery Electrodes via Cold Plasma

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外文摘要：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 pm),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.

外文关键词：

cold plasma depositionlithium-ion batterysolvent-free manufacturing

作者：

Zhiming Liang、Tianyi Li、Holden Chi、Joseph Ziegelbauer、Kai Sun、Ming Wang、Wei Zhang、Tuo Liu、Yang-Tse Cheng、Zonghai Chen、Xiaohong Gayden、Chunmei Ban

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作者单位：

Paul M.Rady Department of Mechanical Engineering,University of Colorado Boulder,Boulder CO 80309,USA

Advanced Photon Source,Argonne National Laboratory,Lemont IL 60439,USA

Intecells Inc.,Southfield MI 48084,USA

Department of Materials Science and Engineering,Michigan Center for Materials Characterization,University of Michigan,Ann Arbor MI 48109,USA

Department of Chemical and Materials Engineering,University of Kentucky,Lexington,KY 40506,USA

Department of Chemistry,University of Kentucky,Lexington KY 40506,USA

Chemical Sciences and Engineering Division,Argonne National Laboratory,Lemont IL 60439,USA

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出版年：

2024

DOI：

10.1002/eem2.12503

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(1)