Polyethyleneimine/Polyacrylamide Composite as Cross-linkable Aqueous Binder for Si/C Anodes of Lithium-ion Batteries

doi:10.11777/j.issn1000-3304.2021.21095

GIEC OpenIR

	Polyethyleneimine/Polyacrylamide Composite as Cross-linkable Aqueous Binder for Si/C Anodes of Lithium-ion Batteries
	Deng, Pan 1,2; Chen, Cheng 1; Zhang, Ling-zhi1
	2021-11-01
发表期刊	ACTA POLYMERICA SINICA
卷号	52 期号:11 页码:1473-1480
通讯作者	Zhang, Ling-zhi(lzzhang@ms.giec.ac.cn)
摘要	High-capacity Si/C anodes face the huge volume change during Li insertion/extraction process, which consequently leads to the pulverization of the silicon and eventually capacity fading and poor cycle life of lithium-ion batteries. To tackle this issue, new binder materials is extensively explored to improve the cycle life by effectively alleviating the huge volume change, and thus improving the cycling life. In this work, a new cross-linkable aqueous composite binder based on branched polyethyleneimine and polyacrylamide (BPEI-PAM) for Si/C anodes is reported. TGA, DSC, FTIR measurements are performed to characterize the crosslinking reaction of BPEI and PAM and their thermal properties. The electrochemical performances of the Si anodes with BPEI-PAM new binder are investigated and compared with the conventional aqueous binder of carboxymethyl cellulose/styrene butadiene rubber (CMC/SBR). By using the optimized BPEI-PAM binder (1:6 in molar ratio), the Si/C electrode exhibits the higher peel strength of 0.82 N/cm as compared with 0.32 N/cm for CMC/SBR. Even at a high loading of 3.0 mg/cm(2), the Si/C electrode with BPEI-PAM can still maintain 81.3% capacity retention after 200 cycles, better than 76.1% for the electrode with CMC/SBR. This improved electrochemical performances can be attributed to the higher adhesion property of BPEI-PAM binder after crosslinking during the process of Si/C electrodes.
关键词	Lithium-ion battery Si/C anode Aqueous binder
DOI	10.11777/j.issn1000-3304.2021.21095
关键词[WOS]	SILICON-GRAPHITE COMPOSITE ; HIGH-CAPACITY ANODES ; NETWORK BINDER ; ELECTRODES ; ALGINATE
收录类别	SCI
语种	英语
WOS研究方向	Polymer Science
WOS类目	Polymer Science
WOS记录号	WOS:000717324100006
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/35331
专题	中国科学院广州能源研究所
通讯作者	Zhang, Ling-zhi
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy Guangdong Prov Key L, Guangzhou 510640, Peoples R China 2.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Deng, Pan,Chen, Cheng,Zhang, Ling-zhi. Polyethyleneimine/Polyacrylamide Composite as Cross-linkable Aqueous Binder for Si/C Anodes of Lithium-ion Batteries[J]. ACTA POLYMERICA SINICA,2021,52(11):1473-1480.
APA	Deng, Pan,Chen, Cheng,&Zhang, Ling-zhi.(2021).Polyethyleneimine/Polyacrylamide Composite as Cross-linkable Aqueous Binder for Si/C Anodes of Lithium-ion Batteries.ACTA POLYMERICA SINICA,52(11),1473-1480.
MLA	Deng, Pan,et al."Polyethyleneimine/Polyacrylamide Composite as Cross-linkable Aqueous Binder for Si/C Anodes of Lithium-ion Batteries".ACTA POLYMERICA SINICA 52.11(2021):1473-1480.