阴极
材料科学
离子
锌
电气工程
化学
冶金
工程类
有机化学
作者
Yamin Feng,Yonglei Feng,Yan Zhang,Lingling Sun,Xiaoli Li,Ming Meng,Yu Zhu,Kuili Liu
标识
DOI:10.1016/j.jpowsour.2022.231944
摘要
Aqueous zinc-ion batteries (AZIBs) have attracted considerable attention owing to their high energy density, low cost, and high safety. However, due to their dissolution and lattice collapse, the electrode materials have low rate capacity and poor cycling stability. In this study, a novel VS 2 / MXene cathode material is fabricated. Owing to the large layer spacing and hydrophobic nature of VS 2 as well as the high metallic conductivity of Ti 3 C 2 T x MXene, ionic transfer and electronic diffusion kinetics in VS 2 / MXene are significantly improved. The VS 2 / MXene cathodes show excellent cycle life, retaining 93.4% of their capacity after 2400 cycles, and an exceptional capacity of 213.4 mAh g −1 at 0.2 A g −1 . Flexible zinc-ion microbattery (ZIMB) assemble with a VS 2 / MXene cathode and a Zn/MXene anode demonstrates a high capacity of 30.8 μWh cm −2 at a power density of 0.57 mW cm −2 and an ultralong cycle life with almost no capacity reduction after 2000 cycles. This study offers a novel strategy for the effective design of high-performance cathodes and provides potential applications for commercial ZIMBs. • 1.A zinc-ion microbattery based on VS 2 /MXene cathode and Zn/MXene anode is assembled. • 2.The zinc storage mechanism of VS 2 /MXene cathode is studied. • 3.The novel zinc-ion microbattery presents ultralong cycle life and flexibility.
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