纳米片
插层(化学)
熔盐
材料科学
化学工程
碳纤维
结晶度
阴极
储能
无定形固体
盐(化学)
复合数
石墨
石墨氮化碳
纳米技术
无机化学
化学
催化作用
有机化学
复合材料
物理化学
功率(物理)
冶金
工程类
物理
光催化
量子力学
作者
Kang Sun,Ying Wang,Chengshuai Chang,Song Yang,Shuanlong Di,Ping Niu,Shulan Wang,Li Li
标识
DOI:10.1016/j.cej.2021.131591
摘要
Due to high theoretical capacity and chemical stability, graphitic carbon nitride (g-C3N4) is viewed as a promising electrode candidate for energy storage devices. Nevertheless, constrained by crystallinity destruction during metal ion intercalation and large aggregation, the actual capacity of g-C3N4 is very low. Unlike amorphous or semi-crystalline C3N4 fabricated via conventional methods, here we propose a molten-salt synthesis protocol of crystalline C3N4 based carbonaceous composite. Interestingly, we find carbon addition under the molten salt environment can greatly alleviate aggregation of C3N4, leading to formation of nanosheet-like structure with abundant edges/pores and high pyridinic N contents. As a proof of concept, with glucose used as the prototype carbon source, as-prepared crystalline C3N4/C delivered a record-high reversible capacity of 286 mA h/g at 0.05 A/g while maintaining outstanding full-cell performances when assembled with a commercial-grade cathode. This work highlights an effective approach to advancing energy storage use of C3N4.
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