Highly conductive C-Si@G nanocomposite as a high-performance anode material for Li-ion batteries
Highly conductive C-Si@G nanocomposite as a high-performance anode material for Li-ion batteries
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高导电C-Si@G纳米复合材料作为高性能锂离子电池负极材料
DOI：
10.1016/j.electacta.2018.11.020
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发表时间：
2019-02
影响因子：
6.6
通讯作者：
Liao Jiqiao
中科院分区：
文献类型：
--
作者：
Yi Xu;Yu Wan-Jing;Tsiamtsouri Maria A.;Zhang Fuqin;He Wenjie;Dai Qiongyu;Hu Shengyong;Tong Hui;Zheng Junchao;Zhang Bao;Liao Jiqiao
在炭化温度下，将氧化石墨烯包覆的Si纳米颗粒（NPs）与聚偏氟乙烯（PVDF）衍生的碳进行组装，并进行焊接处理，制备了一种新型的碳包覆Si纳米颗粒（NPs）包裹在三维石墨烯网络（C-Si@G）中。直径约50 nm的非晶碳包覆Si NPs被完全包裹在三维导电石墨烯网络中。作为锂离子电池（LIBs）的负极材料，C-Si@G纳米复合材料在0.1 a g−1的恒定速率下具有2883.1 mAh g−1的优异锂存储容量。同时，在5 a g−1的速率下，C-Si@G纳米复合材料在270次循环后获得了稳定的循环性能，比容量为~ 752 mAh g−1。C-Si@G在理想的容量、可靠的循环性能和高倍率能力方面的优越电化学性能归功于碳涂层和3D石墨烯的空隙空间显著增强了电导率，以缓冲Si NPs的严重体积变化，增强了电荷转移能力，促进了阳极的锂化过程。
A novel hybrid material of carbon-coated Si nanoparticles (NPs) encapsulated in 3D graphene network (C-Si@G) was facilely synthesized by the assembly of graphene oxide-encapsulated Si NPs followed by a soldering treatment with carbon derived from polyvinylidene fluoride (PVDF) at a carbonization temperature. The amorphous carbon-coated Si NPs of ∼50 nm in diameter were completely wrapped in 3D conductive graphene network. As a negative electrode material of lithium-ion batteries (LIBs), C-Si@G nanocomposite delivered a superior Li-storage capacity of 2883.1 mAh g−1under a constant rate of 0.1 A g−1. Meanwhile, a stable cycling performance with a specific capacity of ∼752 mAh g−1was achieved after 270 cycles for C-Si@G nanocomposite at a rate of 5 A g−1. The superior electrochemical properties of C-Si@G with respect to the desirable capacity, reliable cyclic performance, and high rate ability were attributed to the significantly enhanced electrical conductivity by carbon coating and void space of 3D graphene to buffer the severe volume variation of Si NPs as well as enhanced charge transfer ability and promoted lithiation process of the anode.
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影响因子：
16.6
作者：
Wu, Shaofei;Wang, Wenxi;Li, Minchan;Cao, Lujie;Lyu, Fucong;Yang, Mingyang;Wang, Zhenyu;Shi, Yang;Nan, Bo;Yu, Sicen;Sun, Zhifang;Liu, Yao;Lu, Zhouguang
通讯作者：
Lu, Zhouguang
影响因子：
15
作者：
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通讯作者：
Grey, Clare P.
影响因子：
32.5
作者：
Li, Zhi;Xu, Zhanwei;Mitlin, David
通讯作者：
Mitlin, David
影响因子：
4.9
作者：
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通讯作者：
Xufeng Zhou;Zhaoping Liu
影响因子：
27.8
作者：
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通讯作者：
Xin Zhao;C. Hayner;M. Kung;H. Kung