材料科学
电化学
阴极
储能
纳米复合材料
石墨烯
化学工程
复合数
水溶液
钒
电解质
纳米技术
无机化学
电极
冶金
复合材料
化学
物理
工程类
物理化学
功率(物理)
量子力学
作者
Binxu Lan,Chen Tang,Lineng Chen,Wenwei Zhang,Wen Tang,Chunli Zuo,Xudong Fu,Shen Dong,Qinyou An
标识
DOI:10.1016/j.jallcom.2019.153372
摘要
Aqueous zinc ion batteries (ZIBs) have recently attracted an increasing attention as an environmental friendliness, low cost and highly potential novel energy storage system. Although vanadium-based materials serve as a capable of arousing and holding the attention cathode materials for ZIBs, whereas low conductivity and confusing zinc ion storage mechanisms remain an obstacle. Herein, FeVO4⋅nH2[email protected] composite is employed to evaluate zinc ion storage capability as a cathode for the first time in 2 M Zn(TFSI)2 electrolyte. Benefiting from the large lattice spacing, dual electrochemical activity and fast electron transfer, the composite delivers excellent rate performance and long life cycle (the capacity retained ∼100 mAh g−1 at 1.0 A g−1 after 1000 cycle). In addition, the electrochemical performance of graphene-modified FeVO4⋅nH2O is superior to other precursors for comparison. Furthermore, the intercalated/de-intercalated mechanism of zinc ion is distinct from the traditional conversion reaction, which is confirmed by in-situ X-ray diffraction and various ex-situ techniques.
科研通智能强力驱动
Strongly Powered by AbleSci AI