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Title: Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries

Abstract

Although significant progress has been made in improving cycling performance of silicon-based electrodes, few studies have been performed on the architecture effect on polymer binder performance for lithium-ion batteries. A systematic study on the relationship between polymer architectures and binder performance is especially useful in designing synthetic polymer binders. Herein, a graft block copolymer with readily tunable architecture parameters is synthesized and tested as the polymer binder for the high-mass loading silicon (15 wt %)/graphite (73 wt %) composite electrode (active materials >2.5 mg/cm2). With the same chemical composition and functional group ratio, the graft block copolymer reveals improved cycling performance in both capacity retention (495 mAh/g vs 356 mAh/g at 100th cycle) and Coulombic efficiency (90.3% vs 88.1% at first cycle) than the physical mixing of glycol chitosan (GC) and lithium polyacrylate (LiPAA). Galvanostatic results also demonstrate the significant impacts of different architecture parameters of graft copolymers, including grafting density and side chain length, on their ultimate binder performance. By simply changing the side chain length of GC-g-LiPAA, the retaining delithiation capacity after 100 cycles varies from 347 mAh/g to 495 mAh/g.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [1];  [5];  [5];  [5]; ORCiD logo [3];  [3];  [6]; ORCiD logo [7]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  2. Tulane Univ., New Orleans, LA (United States). Dept. of Physics and Engineering Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy & Transportation Science Division
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1435230
Alternate Identifier(s):
OSTI ID: 1436937; OSTI ID: 1468273
Grant/Contract Number:  
AC05-00OR22725; DMR-1408811
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 4; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; graft copolymer; grafting density; polymer binder; side chain length; silicon/graphite anode

Citation Formats

Cao, Peng-Fei, Naguib, Michael, Du, Zhijia, Stacy, Eric, Li, Bingrui, Hong, Tao, Xing, Kunyue, Voylov, Dmitry N., Li, Jianlin, Wood, David L., Sokolov, Alexei P., Nanda, Jagjit, and Saito, Tomonori. Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries. United States: N. p., 2018. Web. doi:10.1021/acsami.7b13205.
Cao, Peng-Fei, Naguib, Michael, Du, Zhijia, Stacy, Eric, Li, Bingrui, Hong, Tao, Xing, Kunyue, Voylov, Dmitry N., Li, Jianlin, Wood, David L., Sokolov, Alexei P., Nanda, Jagjit, & Saito, Tomonori. Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries. United States. https://doi.org/10.1021/acsami.7b13205
Cao, Peng-Fei, Naguib, Michael, Du, Zhijia, Stacy, Eric, Li, Bingrui, Hong, Tao, Xing, Kunyue, Voylov, Dmitry N., Li, Jianlin, Wood, David L., Sokolov, Alexei P., Nanda, Jagjit, and Saito, Tomonori. Thu . "Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries". United States. https://doi.org/10.1021/acsami.7b13205. https://www.osti.gov/servlets/purl/1435230.
@article{osti_1435230,
title = {Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries},
author = {Cao, Peng-Fei and Naguib, Michael and Du, Zhijia and Stacy, Eric and Li, Bingrui and Hong, Tao and Xing, Kunyue and Voylov, Dmitry N. and Li, Jianlin and Wood, David L. and Sokolov, Alexei P. and Nanda, Jagjit and Saito, Tomonori},
abstractNote = {Although significant progress has been made in improving cycling performance of silicon-based electrodes, few studies have been performed on the architecture effect on polymer binder performance for lithium-ion batteries. A systematic study on the relationship between polymer architectures and binder performance is especially useful in designing synthetic polymer binders. Herein, a graft block copolymer with readily tunable architecture parameters is synthesized and tested as the polymer binder for the high-mass loading silicon (15 wt %)/graphite (73 wt %) composite electrode (active materials >2.5 mg/cm2). With the same chemical composition and functional group ratio, the graft block copolymer reveals improved cycling performance in both capacity retention (495 mAh/g vs 356 mAh/g at 100th cycle) and Coulombic efficiency (90.3% vs 88.1% at first cycle) than the physical mixing of glycol chitosan (GC) and lithium polyacrylate (LiPAA). Galvanostatic results also demonstrate the significant impacts of different architecture parameters of graft copolymers, including grafting density and side chain length, on their ultimate binder performance. By simply changing the side chain length of GC-g-LiPAA, the retaining delithiation capacity after 100 cycles varies from 347 mAh/g to 495 mAh/g.},
doi = {10.1021/acsami.7b13205},
journal = {ACS Applied Materials and Interfaces},
number = 4,
volume = 10,
place = {United States},
year = {Thu Jan 04 00:00:00 EST 2018},
month = {Thu Jan 04 00:00:00 EST 2018}
}

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Cited by: 66 works
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Figures / Tables:

Scheme 1. Scheme 1.: Synthesis of graft copolymer GC-g-LiPAA via RAFT polymerization

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