摘要
Na-ion batteries(NIBs)have attracted significant attention owing to Na being an abundant resource that is uniformly distributed in the Earth's crust.Several 3d transition metal(TM)ions have been thoroughly investigated as charge compensators in single or multiple composition systems to enhance the electrochemical performance of cathodes for the practical applications.In this review,the composition-structure-property relationship of Ni-based cathodes has been reviewed as a design perspective for NIB'S cathodes.The typical Ni-based cathode materials have bee n systematically summarized and comparatively analyzed,and it is dem on strated that Ni io ns can be used to provide charge compensation.Moreover,Ni-based cathodes present high reversible capacity owing to the multi-electron redox reactions and suitable redox pote ntial of Ni-ions redox.However,con sidering the abundan ce,cost,and hygroscopic properties of Ni eleme nt,the content of 0.15-0.35 per formula can be optimal for enhancing the performance of cathodes.Lastly,further perspectives on designing Ni?containing cathodes,including Ni-rich layered cathodes,have been discussed,which could promote the practical applications of NIBs for grid-scale energy storage in future.
基金
This work was supported by the National Key R&D Program of China(No.2016YFB0901500)
the National Natural Science Foundation of China(Nos.51725206 and 51421002)
the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA21070500)
Beijing Natural Science Fund-Haidian Original Innovation Joint Fund(No.L182056)
Beijing Municipal Science and Technology Commission(No.Z181100004718008)
C.L.Z.also thanks to the State Scholarship Fund of China Scholarship Council(CSC).
