Strategies to prolong operational life are highly pursued to strengthen the advantage of cost-effectiveness on sodium-ion batteries(SIBs).We demonstrate the crucial influence of particles'internal mechanical strai...Strategies to prolong operational life are highly pursued to strengthen the advantage of cost-effectiveness on sodium-ion batteries(SIBs).We demonstrate the crucial influence of particles'internal mechanical strains on durability of cathode,which does not attract enough attentions from the community.Among the investigated samples,2%Ti-modified-Na_(0.67)Ni_(0.1)Co_(0.1)Mn_(0.8)O_(2 )suppresses the c-axis lattice variation by 38%,attains the reversible capacity 86%higher after 200 cycles,and still keeps intact morphology.This approach indicates that the mechanical properties could tailor cyclic stability of cathode,which is particular important to further improve competitiveness for SIBs.展开更多
基金supported by the National Natural Science Foundation of China (51872304)Ningbo 2025 Project,China (2018B10061, 2019B10044)the National Key R&D Program of China (2018YFB0905400)。
基金Supported by the China Postdoctoral Science Foundation (Grant No. 2020M682391)Beijing Municipal Science and Technology Commission (Grant No. Z191100004719001)+1 种基金the Start-Up Funding of Jianghan Universitythe “Chutian Scholar Program” of Hubei Province
文摘Strategies to prolong operational life are highly pursued to strengthen the advantage of cost-effectiveness on sodium-ion batteries(SIBs).We demonstrate the crucial influence of particles'internal mechanical strains on durability of cathode,which does not attract enough attentions from the community.Among the investigated samples,2%Ti-modified-Na_(0.67)Ni_(0.1)Co_(0.1)Mn_(0.8)O_(2 )suppresses the c-axis lattice variation by 38%,attains the reversible capacity 86%higher after 200 cycles,and still keeps intact morphology.This approach indicates that the mechanical properties could tailor cyclic stability of cathode,which is particular important to further improve competitiveness for SIBs.
