【摘 要】
：
Coupled with anionic and cationic redox chemistry,Li-rich/excess cathode materials are prospective high-energy-density candidates for the next-generation Li-ion batteries.However,irreversible lattice oxygen loss would exacerbate irreversible transition me
【机 构】
：
Energy Technology Research Institute,National Institute of Advanced Industrial Science and Technolog
论文部分内容阅读
Coupled with anionic and cationic redox chemistry,Li-rich/excess cathode materials are prospective high-energy-density candidates for the next-generation Li-ion batteries.However,irreversible lattice oxygen loss would exacerbate irreversible transition metal migration,resulting in a drastic voltage decay and capacity degeneration.Herein,a metastable layered Li-excess cathode material,T2-type Li0.72[Li0.12Ni0.36Mn0.52]O2,was developed,in which both oxygen stacking arrangement and Li coordina-tion environment fundamentally differ from that in conventional O3-type layered structures.By means of the reversible Li migration processes and structural evolutions,not only can voltage decay be effectively restrained,but also excellent capacity retention can be achieved upon long-term cycling.Moreover,irre-versible/reversible anionic/cationic redox activities have been well assigned and quantified by various in/ex-situ spectroscopic techniques,further clarifying the charge compensation mechanism associated with(de)lithiation.These findings of the novel T2 structure with the enhanced anionic redox stability will pro-vide a new scope for the development of high-energy-density Li-rich cathode materials.
其他文献
Molecularly imprinted polymers (MIPs),as important mimics of antibodies,are chemically synthesized by polymerization in the presence of a target compound.MIPs have found wide applications in important fileds.However,the current molecular imprinting techno
An M6.4 earthquake struck Yangbi County,Dali Prefecture,Yun-nan Province,on May 21,2021,at 21:48 Beijing Time (2021-05-2113:48:37 UTC).Soon thereafter,at 2:04 UTC on May 22,2021(2021o05-2118:04:13 UTC),an M7.4 earthquake struck Madou County,Guoluo Prefect
Despite their rich information content,electronic structure data amassed at high volumes in ab initio molecular dynamics simulations are generally under-utilized.We introduce a transferable high-fidelity neural network representation of such data in the f
A wide array of biological events in the life history of insects are orchestrated by juvenile hormone (JH) and 20-hydroxyecdysone(20E) [1].They control embryonic development,molting,meta-morphosis,and reproduction.Some processes are governed by one of the
In each cell,various components/organelles (including mem-branous and non-membranous organelles) assemble at the proper time and space to function.How organelles lacking a membrane form and the physicochemical natures of such organelles remain unknown.Rec
Strain engineering is a promising method for tuning the electronic properties of two-dimensional (2D)materials,which are capable of sustaining enormous strain thanks to their atomic thinness.However,applying a large and homogeneous strain on these 2D mate
Nonalcoholic fatty liver disease (NAFLD) encompasses a spectrum of pathologies,ranging from steatosis to nonalcoholic steatohepatitis (NASH).The factors promoting the progression of steatosis to NASH are still unclear.Recent studies suggest that mitochond
SnS has been extensively investigated as a potential anode material in potassium-ion batteries (PIBs) for its high theoretical capacity.Nonetheless,it suffers a limited cyclic lifespan owing to its poor electronic conductivity and huge volume expansion.Th
Higher-order topological insulators (HOTIs),with topological corner or hinge states,have emerged as a thriving topic in the field of topological physics.However,few connections have been found for HOTIs with well-explored first-order topological insulator
Exotic quantum phenomena may appear in material systems with multiple orders or phases,where the mutual interactions can give rise to new physics beyond that of each component.Here,we report spec-troscopic evidence for a unique combination of topology and