Boron-Doped, Carbon-Coated SnO2/Graphene Nanosheets for Enhanced Lithium Storage
Boron-Doped, Carbon-Coated SnO2/Graphene Nanosheets for Enhanced Lithium Storage
复制标题
用于增强锂存储的掺硼、碳涂层 SnO2/石墨烯纳米片
DOI：
10.1002/chem.201406029
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发表时间：
2015-03-27
影响因子：
4.3
通讯作者：
Feng, Xinliang
中科院分区：
文献类型：
--
作者：
Liu, Yuxin;Liu, Ping;Feng, Xinliang
杂原子掺杂是调节碳材料电化学性能的有效方法。在这项工作中，硼掺杂，碳包覆的SnO 2/石墨烯杂化物（BCTG）的制备通过蔗糖的水热碳化在SnO 2/石墨烯纳米片和苯硼酸或硼酸作为掺杂源和随后的热处理的存在下。由于其独特的2D核-壳结构和B掺杂的碳壳，BCTG具有增强的导电性和额外的活性位点用于锂存储。以苯基硼酸为B源，所得的杂化材料作为锂离子电池负极表现出优异的电化学性能，在0.1 Ag-1下循环360次后，其稳定容量为1165 mA hg（-1），在3.2 Ag-1下的倍率性能为600 mA hg（-1），优于大多数先前报道的SnO 2基负极材料。
Heteroatom doping is an effective method to adjust the electrochemical behavior of carbonaceous materials. In this work, boron-doped, carbon-coated SnO2/graphene hybrids (BCTGs) were fabricated by hydrothermal carbonization of sucrose in the presence of SnO2/graphene nanosheets and phenylboronic acid or boric acid as dopant source and subsequent thermal treatment. Owing to their unique 2D core-shell architecture and B-doped carbon shells, BCTGs have enhanced conductivity and extra active sites for lithium storage. With phenylboronic acid as B source, the resulting hybrid shows outstanding electrochemical performance as the anode in lithium-ion batteries with a highly stable capacity of 1165 mA hg(-1) at 0.1 Ag-1 after 360 cycles and an excellent rate capability of 600 mA hg(-1) at 3.2 Ag-1, and thus outperforms most of the previously reported SnO2-based anode materials.