文献类型：期刊文献

英文题名：Integrated and Three-Dimensional Network Structure of a SiNWs/CNTs@MOFs Composite to Enhance the Silicon Anode's Electrochemical Performance in Lithium-Ion Batteries

作者：Gu, Zhiqiang[2];Miao, Yu[1];Li, Wenli[2];Chen, Yuxi[2];Xia, Xiaohong[2];Chen, Gairong[1];Liu, Hongbo[1,2]

第一作者：Gu, Zhiqiang

通讯作者：Chen, GR[1];Liu, HB[1];Liu, HB[2]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453033, Henan, Peoples R China;[2]Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453033, Henan, Peoples R China;[2]corresponding author), Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.|[110713]新乡学院化学化工学院;[11071]新乡学院;

年份：2020

卷号：3

期号：4

起止页码：3815-3825

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20203209009846);Scopus(收录号：2-s2.0-85087934010);WOS:【SCI-EXPANDED(收录号:WOS:000529190300078)】；

基金：This work was supported by the joint project from the HenanProvincial of National Natural Science Foundation of China (U1904189), National Natural Science Foundation of China (51772083, 51402101, 51472083), and Key R&D projects of Hunan Province (2018GK1030).

语种：英文

外文关键词：MOFs; SiNWs; three-dimensional network structure; lithium-ion batteries; electrochemical performance

摘要：Constructing the architectural stable silicon composite is significantly critical to enhance the Si electrode cycle life of lithium-ion batteries in which the inevitable volume expansion exerts huge mechanical stress within the Si anode, then bringing about the destruction of the silicon structure and unsatisfactory cyclic performance. In this work, we report an integrated and three-dimensional (3D) network structure of the SiNWs/CNTs@MOFs composite, prepared by a facile in situ growth method. The metal-organic framework (MOF)-derived porous coating and the 3D conducting network structure of the SiNWs/CNTs@C precursor, hand in hand, construct a structurally stable composite, with the SiNW cores fully covered by the MOF coating. Attributing to MOF-derived porous coating, high conductivity of CNTs, and the stable three-dimensional network structure, not only the transport of ions and electrons facilitates but also the stability of the structure during the electrochemical process maintains. The resulting integrated SiNWs/CNTs@MOFs composite enhances the electrode durability and presents a reversible capacity of 1223 mAh g(-1) at a current density of 100 mA g(-1) for 100 cycles and a rate capacity of 765 mAh g(-1) at a high current density of 5 A g(-1).