Tan Yanli, Gao Qiuming, Li Zeyu, Tian Weiqian, Qian Weiwei, Yang Chunxiao, Zhang Hang
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, Beijing 100191, P. R. China.
Sci Rep. 2016 May 24;6:26460. doi: 10.1038/srep26460.
A novel one-step hydrothermal and calcination strategy was developed to synthesize the unique 1D oriented Co3O4 crystal nanofibers with (220) facets on the carbon matrix derived from the natural, abundant and low cost wool fibers acting as both carbon precursor and template reagent. The resultant W2@Co3O4 nanocomposite exhibited very high specific capacity and favorable high-rate capability when used as anode material of lithium ion battery. The high reversible Li(+) ion storage capacity of 986 mAh g(-1) was obtained at 100 mA g(-1) after 150 cycles, higher than the theoretical capacity of Co3O4 (890 mAh g(-1)). Even at the higher current density of 1 A g(-1), the electrode could still deliver a remarkable discharge capacity of 720 mAh g(-1) over 150 cycles.
开发了一种新颖的一步水热和煅烧策略，以合成独特的一维取向Co3O4晶体纳米纤维，其在由天然、丰富且低成本的羊毛纤维衍生的碳基质上具有(220)晶面，羊毛纤维同时充当碳前驱体和模板试剂。所得的W2@Co3O4纳米复合材料用作锂离子电池的负极材料时，表现出非常高的比容量和良好的高倍率性能。在100 mA g(-1)下循环150次后，获得了986 mAh g(-1)的高可逆Li(+)离子存储容量，高于Co3O4的理论容量(890 mAh g(-1))。即使在1 A g(-1)的更高电流密度下，该电极在150次循环中仍能提供720 mAh g(-1)的显著放电容量。
