A general approach to construct alien metal atoms(Al,Cr,Mn,Fe,Co,Ni,Cu,Zn)doped in tin-phthalic acid complex for superior lithium storage  

作　　者：Zi-Bo Zhao Nai-Teng Wu Xi-Ting Wang Jin Li Gui-Long Liu Dong-Lei Guo Guang Sun Xian-Ming Liu 

机构地区：[1]Key Laboratory of Function-Oriented Porous Materials of Henan Province,College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang,471934,China [2]School of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo,454000,China

出　　处：《Rare Metals》2025年第1期158-168,共11页稀有金属(英文版)

基　　金：support from Natural Science Foundations of Henan Province(Nos.222300420502 and 232300420093);the Program for Science and Technology Innovation Talents in Universities of Henan Province(No.24HASTIT006);the Key Science and Technology Program of Henan Province(No.222102240044)。

摘　　要：Tin-based metal organic complexes with breakable coordination bonds,multiple active sites,and high theoretical capacity have attracted wide attentiorials for lithium-ion batteries(LIBs).However,the inferior electrical conductivity and significant volume changes have limited their electrochemical stability and practical application performance.This work proposes a universal doping strategy for the preparation of tin-phthalic acid complexes(Sn-MOF)doped with metal atoms(Al,Cr,Mn,Fe,Co,Ni,Cu,Zn).Metal atoms are uniformly dispersed within Sn-MOF for enhancing electrical conductivity and accommodating appropriate volume expansion,resulting in improved rate capability and cycling stability.Additionally,compared to a series of doped Sn-MOF,Zn-doped Sn-MOF exhibits the most exceptional electrochemical performance with a high reversible capacity of 1131 mAh·g^(-1)and stable cycling performance at a current density of 0.5 A·g^(-1),delivering a capacity of 1065 mAh·g^(-1)after 500 cycles.Zn-doping catalyzes the lithiation reaction between Sn-MOF and Li^(+),promoting their reaction kinetics during the first cycle.Furthermore,the Zn-doped Sn-MOF is inclined to form a thin and stable solid electrolyte interface film to maintain cyclic stability.

关 键 词：Metal organic complexes Lithium-ion batteries DOPED Solid electrolyte interface 

分 类 号：O61[理学—无机化学]