青岛科技大学  English 
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教授 博士生导师  
硕士生导师  

教师拼音名称:linjianjian

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入职时间:2018-09-11

所在单位:化学与分子工程学院

学历:博士研究生

办公地点:四方校区第一实验楼216

性别:女

联系方式:19862229511

学位:工学博士

职称:教授

毕业院校:澳大利亚伍伦贡大学

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Facile synthesis of hierarchical g-C3N4@WS2 composite as Lithium-ion battery anode

关键字:ELECTROCHEMICAL ENERGY-STORAGE; GRAPHITIC CARBON NITRIDE; FEW-LAYER WS2; ENHANCED PERFORMANCE; SODIUM STORAGE; HOLLOW SPHERES; NANOSHEETS; DESIGN; INTERCALATION; ARCHITECTURES

摘要:Transition metal sulfides (TMSs), as highly promising candidate anode materials, are gradually attracting the attention for lithium-ion batteries (LIBs) recently on account of its multiple valence states as well as considerable capacity. Nevertheless, TMSs have relatively low inherent electronic conductivity and large volume variation, which stands in the way of their practical applications. Herein, to ameliorate the drawbacks of TMSs, we report a hierarchical g-C3N4@WS2 composite synthesized by a solvothermal reaction. The as-synthesized g-C3N4@WS2 composite provides abundant reaction active sites for lithium storage and sufficient interspace to buffer the volume variation of WS2 nanoparticles. Moreover, the ultrathin g-C3N4 nanosheets could restraint WS2 nanoparticles from agglomeration, increase the contact chances with electrolyte and facilitate the charge transport and ion diffusion. In consequence, the optimized g-C3N4@WS2 electrode delivers a large discharge capacity (1136.1 mAh g(-1) at 0.1C) and superior cycling stability (433.8 mAh g(-1) after 1000 cycles). In summary, a simple method for constructing hierarchical transition metal sulfides as anode materials for LIBs is proposed.

卷号:435

期号:PT 2

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