Large-scale carbon framework microbelts anchoring ultrafine SnO2 nanoparticles with enhanced lithium storage properties
Large-scale carbon framework microbelts anchoring ultrafine SnO2 nanoparticles with enhanced lithium storage properties
复制标题
大型碳骨架微带锚定超细 SnO2 纳米粒子，具有增强的锂存储性能
DOI：
10.1016/j.electacta.2018.11.175
复制
发表时间：
2019-02
影响因子：
6.6
通讯作者：
Xu Xijin
中科院分区：
文献类型：
--
作者：
Wang Qishang;Xu Junqi;Shen Guangyue;Guo Yaqing;Zhao Xun;Xia Yanjie;Sun Haibin;Hou Peiyou;Xie Wenhe;Xu Xijin
各种纳米结构的sno2作为下一代锂离子电池（LIBs）极具前景的负极材料已被广泛研究。然而，传统的纳米结构存在重团聚和副反应过多的问题，导致库仑效率低，速率性能差，容量衰减剧烈。本研究利用大尺寸碳骨架的高导电性和超细sno2纳米颗粒的高活性之间的协同效应，开发了一种简单而稳健的碳骨架微带锚定超细sno2纳米颗粒（U-SnO2NPs@ cf - mb）的制备策略。纯属捏造的U-SnO2NPs@C-BsF复合提供高容量925 mAh g−1 250年之后200年周期的电流密度 马 g−1,高容量464 mAh g−1 5000年在高电流密度 马 g−1 788和长周期性能 mAh g−1 1000年之后1500年周期的电流密度 马 g−1半的细胞。当与licoo2阴极耦合应用于全电池时，制备的U-SnO2NPs@ cf - mb复合电池在80次循环后保持510 mAh g−1的高容量。值得注意的是，电极显示出位于3.3和2.6 V的两个平台，这表明sno2和Sn之间的转换在满电池中也是高度可逆的。大规模U-SnO2NPs@ cf - mb的优异锂存储性能确保了其在未来锂离子电池中的商业应用前景。
Varieties of nanostructured SnO2have been widely investigated as promising anode material for next generation lithium-ion batteries (LIBs). However, traditional nanostructures suffer from re-agglomeration and excessive side reactions, which lead to low coulombic efficiency, poor rate performance and dramatic capacity decay. Here we develop an easy and robust strategy to fabricate carbon framework microbelts anchoring ultrafine SnO2nanoparticles (U-SnO2NPs@ CF-MBs), which takes advantage of the synergistic effect between high conductivity of large-size carbon framework and high activity of ultrafine SnO2nanoparticles. The as-fabricated U-SnO2NPs@C-BsF composite deliver high capacity of 925 mAh g−1after 250 cycles at current density of 200 mA g−1, high rate capacity of 464 mAh g−1at a high current density of 5000 mA g−1and long cycle performance of 788 mAh g−1after 1000 cycles at current density of 1500 mA g−1in half cells. When applied in a full cell by coupling with a LiCoO2cathode, the fabricated U-SnO2NPs@ CF-MBs composite full cells keep a high capacity of 510 mAh g−1after 80 cycles. Notably, the electrode exhibit two platforms located at 3.3 and 2.6 V, which indicate that the conversion between SnO2and Sn is also highly reversible in full cells. The excellent lithium storage of large-scale U-SnO2NPs@ CF-MBs ensures its great promise for commercial utilization in the future LIBs.
登录
查看更多内容
影响因子：
13.3
作者：
Jianfeng Ye;Huijuan Zhang;Rong Yang;Xingguo Li;L. Qi
通讯作者：
Jianfeng Ye;Huijuan Zhang;Rong Yang;Xingguo Li;L. Qi
碳纳米纤维模板制备介孔SnO2纳米管及其储锂性能
影响因子：
6.6
作者：
Shujiang Ding;Zhenglong Yang;Wei Yu;Ben Q. Li
通讯作者：
Ben Q. Li
锂离子电池高性能Li3VO4@LiVO2阳极中自增强电导率和锂离子扩散引起的赝电容电荷存储
影响因子：
6.2
作者：
Tao Kang;Dongyang Shen;Shibing Ni;Qichang Chen;Tao Li;Xuelin Yang;Jinbao Zhao
通讯作者：
Jinbao Zhao
影响因子：
6.7
作者：
Xiaosi Zhou;Le Yu;X. Lou
通讯作者：
Xiaosi Zhou;Le Yu;X. Lou
影响因子：
10.9
作者：
Noerochim, Lukman;Wang, Jia-Zhao;Liu, Hua-Kun
通讯作者：
Liu, Hua-Kun