Lithium Substituted Poly(acrylic acid) as a Mechanically Robust Binder for Low-Cost Silicon Microparticle Electrodes

Dingying Dang; Yikai Wang; Ming Wang; Jiazhi Hu; Chunmei Ban; Yang Tse Cheng

doi:10.1021/acsaem.0c01923

Lithium Substituted Poly(acrylic acid) as a Mechanically Robust Binder for Low-Cost Silicon Microparticle Electrodes

Dingying Dang, Yikai Wang, Ming Wang, Jiazhi Hu, Chunmei Ban, Yang Tse Cheng

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Silicon microparticles (SiMPs) are attractive anode materials for lithium ion batteries due to their high theoretical capacity, low cost, high initial Coulombic efficiency, and large packaging density. However, the substantial volume change induced by lithiation/delithiation causes the pulverization and loss of electronic conductivity of SiMPs, which lead to the fast capacity fading. In this study, we report that the cycling stability of SiMP electrodes can be effectively improved by using environmentally friendly and cost-efficient lithium (Li) substituted poly(acrylic acid) (PAA-xLi, x ≤ 1) as binders. Noticeably, the SiMP/PAA-0.75Li electrode with a mass loading of ∼0.9 mg/cm² can deliver a significantly higher capacity (2125 mAh/g, 100 cycles) at C/3 (1200 mA/g) than that (730 mAh/g) made of the pristine PAA (i.e., PAA-0Li) binder. We focused on understanding the mechanism of PAA-xLi binders by correlating the mechanical properties of SiMP/PAA-xLi electrodes with their electrochemical stability. The effectiveness of PAA-0.75Li can be attributed to its high elasticity and strong adhesion with SiMPs, both of which greatly enhance the mechanical integrity of SiMP electrodes and help keep pulverized SiMPs coalesced during cycling. These findings offer important design principles of binders for low-cost SiMP electrodes.

Original language	English
Pages (from-to)	10940-10949
Number of pages	10
Journal	ACS Applied Energy Materials
Volume	3
Issue number	11
DOIs	https://doi.org/10.1021/acsaem.0c01923
State	Published - Nov 23 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society

Funding

This work was supported by the National Science Foundation Award No. 1355438. The authors also acknowledge the support by the Assistant Secretary for Energy Efficiency and Renewable Energy, Vehicle Technologies Office of the U.S. Department of Energy Battery Materials Research (BMR) Program under Contract Number DE-EE0007787.

Funders	Funder number
Office of Energy Efficiency and Renewable Energy
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	1355438
U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center	DE-EE0007787

Keywords

Lithium ion battery
Mechanical integrity
Poly(acrylic acid)
Polymeric binder
Silicon microparticle electrode

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsaem.0c01923

Cite this

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title = "Lithium Substituted Poly(acrylic acid) as a Mechanically Robust Binder for Low-Cost Silicon Microparticle Electrodes",

abstract = "Silicon microparticles (SiMPs) are attractive anode materials for lithium ion batteries due to their high theoretical capacity, low cost, high initial Coulombic efficiency, and large packaging density. However, the substantial volume change induced by lithiation/delithiation causes the pulverization and loss of electronic conductivity of SiMPs, which lead to the fast capacity fading. In this study, we report that the cycling stability of SiMP electrodes can be effectively improved by using environmentally friendly and cost-efficient lithium (Li) substituted poly(acrylic acid) (PAA-xLi, x ≤ 1) as binders. Noticeably, the SiMP/PAA-0.75Li electrode with a mass loading of ∼0.9 mg/cm2 can deliver a significantly higher capacity (2125 mAh/g, 100 cycles) at C/3 (1200 mA/g) than that (730 mAh/g) made of the pristine PAA (i.e., PAA-0Li) binder. We focused on understanding the mechanism of PAA-xLi binders by correlating the mechanical properties of SiMP/PAA-xLi electrodes with their electrochemical stability. The effectiveness of PAA-0.75Li can be attributed to its high elasticity and strong adhesion with SiMPs, both of which greatly enhance the mechanical integrity of SiMP electrodes and help keep pulverized SiMPs coalesced during cycling. These findings offer important design principles of binders for low-cost SiMP electrodes.",

keywords = "Lithium ion battery, Mechanical integrity, Poly(acrylic acid), Polymeric binder, Silicon microparticle electrode",

author = "Dingying Dang and Yikai Wang and Ming Wang and Jiazhi Hu and Chunmei Ban and Cheng, \{Yang Tse\}",

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doi = "10.1021/acsaem.0c01923",

language = "English",

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AU - Dang, Dingying

AU - Wang, Yikai

AU - Wang, Ming

AU - Hu, Jiazhi

AU - Ban, Chunmei

AU - Cheng, Yang Tse

PY - 2020/11/23

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N2 - Silicon microparticles (SiMPs) are attractive anode materials for lithium ion batteries due to their high theoretical capacity, low cost, high initial Coulombic efficiency, and large packaging density. However, the substantial volume change induced by lithiation/delithiation causes the pulverization and loss of electronic conductivity of SiMPs, which lead to the fast capacity fading. In this study, we report that the cycling stability of SiMP electrodes can be effectively improved by using environmentally friendly and cost-efficient lithium (Li) substituted poly(acrylic acid) (PAA-xLi, x ≤ 1) as binders. Noticeably, the SiMP/PAA-0.75Li electrode with a mass loading of ∼0.9 mg/cm2 can deliver a significantly higher capacity (2125 mAh/g, 100 cycles) at C/3 (1200 mA/g) than that (730 mAh/g) made of the pristine PAA (i.e., PAA-0Li) binder. We focused on understanding the mechanism of PAA-xLi binders by correlating the mechanical properties of SiMP/PAA-xLi electrodes with their electrochemical stability. The effectiveness of PAA-0.75Li can be attributed to its high elasticity and strong adhesion with SiMPs, both of which greatly enhance the mechanical integrity of SiMP electrodes and help keep pulverized SiMPs coalesced during cycling. These findings offer important design principles of binders for low-cost SiMP electrodes.

AB - Silicon microparticles (SiMPs) are attractive anode materials for lithium ion batteries due to their high theoretical capacity, low cost, high initial Coulombic efficiency, and large packaging density. However, the substantial volume change induced by lithiation/delithiation causes the pulverization and loss of electronic conductivity of SiMPs, which lead to the fast capacity fading. In this study, we report that the cycling stability of SiMP electrodes can be effectively improved by using environmentally friendly and cost-efficient lithium (Li) substituted poly(acrylic acid) (PAA-xLi, x ≤ 1) as binders. Noticeably, the SiMP/PAA-0.75Li electrode with a mass loading of ∼0.9 mg/cm2 can deliver a significantly higher capacity (2125 mAh/g, 100 cycles) at C/3 (1200 mA/g) than that (730 mAh/g) made of the pristine PAA (i.e., PAA-0Li) binder. We focused on understanding the mechanism of PAA-xLi binders by correlating the mechanical properties of SiMP/PAA-xLi electrodes with their electrochemical stability. The effectiveness of PAA-0.75Li can be attributed to its high elasticity and strong adhesion with SiMPs, both of which greatly enhance the mechanical integrity of SiMP electrodes and help keep pulverized SiMPs coalesced during cycling. These findings offer important design principles of binders for low-cost SiMP electrodes.

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KW - Polymeric binder

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Lithium Substituted Poly(acrylic acid) as a Mechanically Robust Binder for Low-Cost Silicon Microparticle Electrodes

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

UN SDGs

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