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Title: Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery

Abstract

Silicon(Si)/graphene composite has been regarded as one of the most promising candidates for next generation anode materials with high power and energy density in lithium ion batteries. Introduction of graphene in Si anodes could improve the electronic conductivity, suppress the severe volume expansion of Si, and facilitate the formation of stable solid electrolyte interphase, etc. However, traditionally mechanical mixing of Si and graphene cannot realize uniform distribution of Si particles on the graphene sheets, which would largely weaken the effectiveness of the graphene in the composite. In this study, nano-Si/reduced graphene oxide porous composite (p Si/rGO) has been fabricated by a facile electrostatic self-assembly approach via using SiO 2 as the sacrificial template. Compared with the simply mechanically mixed nano-Si and rGO (Si/rGO), the nano-Si particles could be more uniformly dispersed among the rGO sheets in the p Si/rGO, which significantly increases its electronic conductivity. Moreover, the drastic volume expansion of nano-Si during repeated lithiation/delithiation cycles also has been effectively accommodated by the large number of pores left after removing the SiO 2 template in the composite. Thus, the p Si/rGO presented largely enhanced electrochemical performances, showing a high reversible capacity up to 1849 mA h g -1 at 0.2more » A g -1 with good capacity retention, and high rate capability (535 mA h g -1 at 2 A g -1).« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [3]
  1. Southwest Petroleum Univ., Chengdu (China). The Center of New Energy Materials and Technology and School of Materials Science and Engineering
  2. China Academy of Engineering Physics, Mianyang (China). Inst. of Materials
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE; National Natural Science Foundation of China (NNSFC); Sichuan Provincial Government (China)
OSTI Identifier:
1457750
Report Number(s):
PNNL-SA-135998
Journal ID: ISSN 0169-4332; PII: S0169433218317148
Grant/Contract Number:
AC0576RL01830; 51502250; 51604250; 51474196; 51302232; 2015JY0089; 2016RZ0071; 16ZB0085; 2015CXTD04; X151517KCL34; 201710615031
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Surface Science
Additional Journal Information:
Journal Volume: 456; Journal Issue: C; Journal ID: ISSN 0169-4332
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; Silicon; Reduced graphene oxide; Electrostatic self-assembly; Silica; Lithium ion battery

Citation Formats

Wang, Ming-Shan, Wang, Zhi-Qiang, Jia, Ran, Yang, Yi, Zhu, Fang-Yu, Yang, Zhen-Liang, Huang, Yun, Li, Xing, and Xu, Wu. Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery. United States: N. p., 2018. Web. doi:10.1016/J.APSUSC.2018.06.147.
Wang, Ming-Shan, Wang, Zhi-Qiang, Jia, Ran, Yang, Yi, Zhu, Fang-Yu, Yang, Zhen-Liang, Huang, Yun, Li, Xing, & Xu, Wu. Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery. United States. doi:10.1016/J.APSUSC.2018.06.147.
Wang, Ming-Shan, Wang, Zhi-Qiang, Jia, Ran, Yang, Yi, Zhu, Fang-Yu, Yang, Zhen-Liang, Huang, Yun, Li, Xing, and Xu, Wu. Mon . "Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery". United States. doi:10.1016/J.APSUSC.2018.06.147.
@article{osti_1457750,
title = {Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery},
author = {Wang, Ming-Shan and Wang, Zhi-Qiang and Jia, Ran and Yang, Yi and Zhu, Fang-Yu and Yang, Zhen-Liang and Huang, Yun and Li, Xing and Xu, Wu},
abstractNote = {Silicon(Si)/graphene composite has been regarded as one of the most promising candidates for next generation anode materials with high power and energy density in lithium ion batteries. Introduction of graphene in Si anodes could improve the electronic conductivity, suppress the severe volume expansion of Si, and facilitate the formation of stable solid electrolyte interphase, etc. However, traditionally mechanical mixing of Si and graphene cannot realize uniform distribution of Si particles on the graphene sheets, which would largely weaken the effectiveness of the graphene in the composite. In this study, nano-Si/reduced graphene oxide porous composite (p Si/rGO) has been fabricated by a facile electrostatic self-assembly approach via using SiO2 as the sacrificial template. Compared with the simply mechanically mixed nano-Si and rGO (Si/rGO), the nano-Si particles could be more uniformly dispersed among the rGO sheets in the p Si/rGO, which significantly increases its electronic conductivity. Moreover, the drastic volume expansion of nano-Si during repeated lithiation/delithiation cycles also has been effectively accommodated by the large number of pores left after removing the SiO2 template in the composite. Thus, the p Si/rGO presented largely enhanced electrochemical performances, showing a high reversible capacity up to 1849 mA h g-1 at 0.2 A g-1 with good capacity retention, and high rate capability (535 mA h g-1 at 2 A g-1).},
doi = {10.1016/J.APSUSC.2018.06.147},
journal = {Applied Surface Science},
number = C,
volume = 456,
place = {United States},
year = {Mon Jun 18 00:00:00 EDT 2018},
month = {Mon Jun 18 00:00:00 EDT 2018}
}

Journal Article:
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