Title: Highly Graphitized Carbon Coating on SiO with a π–π Stacking Precursor Polymer for High Performance Lithium-Ion Batteries

Abstract

A highly graphitized carbon on a silicon monoxide (SiO) surface coating at low temperature, based on polymer precursor π–π stacking, was developed. A novel conductive and electrochemically stable carbon coating was rationally designed to modify the SiO anode materials by controlling the sintering of a conductive polymer, a pyrene-based homopolymer poly (1-pyrenemethyl methacrylate; PPy), which achieved high graphitization of the carbon layers at a low temperature and avoided silicon carbide formation and possible SiO material transformation. When evaluated as the anode of a lithium-ion battery (LIB), the carbon-coated SiO composite delivered a high discharge capacity of 2058.6 mAh/g at 0.05 C of the first formation cycle with an initial Coulombic efficiency (ICE) of 62.2%. After 50 cycles at 0.1 C, this electrode capacity was 1090.2 mAh/g (~82% capacity retention, relative to the capacity of the second cycle at 0.1 °C rate), and a specific capacity of 514.7 mAh/g was attained at 0.3 C after 500 cycles. Furthermore, the coin-type full cell composed of the carbon coated SiO composite anode and the Li[Ni_0.5Co_0.2Mn_0.3O₂] cathode attained excellent cycling performance. The results show the potential applications for using a π–π stacking polymer precursor to generate a highly graphitize coating for next-generation high-energy-density LIBs.

Authors:

Fang, Shan ^[1]; Li, Ning ^[2]; Zheng, Tianyue ^[2]; Fu, Yanbao ^[2]; Song, Xiangyun ^[2]; Zhang, Ting ^[2]; Li, Shaopeng ^[3]; Wang, Bin ^[2]; Zhang, Xiaogang ^[3]; Liu, Gao ^[2]

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+ Show Author Affiliations

1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resources Division. Energy Technologies Area; Nanjing Univ. of Aeronautics and Astronautics (China). Jiangsu Key Lab. of Electrochemical Energy Storage Technologies. College of Material Science and Engineering
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resources Division. Energy Technologies Area
3. Nanjing Univ. of Aeronautics and Astronautics (China). Jiangsu Key Lab. of Electrochemical Energy Storage Technologies. College of Material Science and Engineering

Publication Date:

Mon Jun 04 00:00:00 EDT 2018

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (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 Program on Key Basic Research Project of China; National Natural Science Foundation of China (NSFC); Natural Science Foundation of Jiangsu Province (China)

OSTI Identifier:

1489658

Grant/Contract Number:  

AC02-05CH11231; 2014CB239701; 51372116; 51504139; BK2011030; BK20150739

Resource Type:

Accepted Manuscript

Journal Name:

Polymers

Additional Journal Information:

Journal Volume: 10; Journal Issue: 6; Journal ID: ISSN 2073-4360

Publisher:

MDPI

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE; graphite carbon; silicon monoxide; anode; coating; lithium-ion battery