Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes

Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work,...

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Auteurs principaux:	Jinshan Mo, Dongmei Zhang, Mingzhe Sun, Lehao Liu, Weihao Hu, Bing Jiang, Lihua Chu, Meicheng Li
Format:	article
Langue:	EN
Publié:	MDPI AG 2021
Sujets:	binder ternary cathode material lithium-ion battery electrochemical performance Organic chemistry QD241-441
Accès en ligne:	https://doaj.org/article/b37e7154f80b483a980bb32b3f63447e
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spelling	oai:doaj.org-article:b37e7154f80b483a980bb32b3f63447e2021-11-25T18:49:11ZPolyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes10.3390/polym132239922073-4360https://doaj.org/article/b37e7154f80b483a980bb32b3f63447e2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/3992https://doaj.org/toc/2073-4360Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.Jinshan MoDongmei ZhangMingzhe SunLehao LiuWeihao HuBing JiangLihua ChuMeicheng LiMDPI AGarticlebinderternary cathode materiallithium-ion batteryelectrochemical performanceOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3992, p 3992 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	binder ternary cathode material lithium-ion battery electrochemical performance Organic chemistry QD241-441
spellingShingle	binder ternary cathode material lithium-ion battery electrochemical performance Organic chemistry QD241-441 Jinshan Mo Dongmei Zhang Mingzhe Sun Lehao Liu Weihao Hu Bing Jiang Lihua Chu Meicheng Li Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
description	Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.
format	article
author	Jinshan Mo Dongmei Zhang Mingzhe Sun Lehao Liu Weihao Hu Bing Jiang Lihua Chu Meicheng Li
author_facet	Jinshan Mo Dongmei Zhang Mingzhe Sun Lehao Liu Weihao Hu Bing Jiang Lihua Chu Meicheng Li
author_sort	Jinshan Mo
title	Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
title_short	Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
title_full	Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
title_fullStr	Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
title_full_unstemmed	Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes
title_sort	polyethylene oxide as a multifunctional binder for high-performance ternary layered cathodes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b37e7154f80b483a980bb32b3f63447e
work_keys_str_mv	AT jinshanmo polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT dongmeizhang polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT mingzhesun polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT lehaoliu polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT weihaohu polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT bingjiang polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT lihuachu polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes AT meichengli polyethyleneoxideasamultifunctionalbinderforhighperformanceternarylayeredcathodes
_version_	1718410670129545216

Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes

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