首页|Phase-engineering modulation of Mn-based oxide cathode for constructing super-stable sodium storage
Phase-engineering modulation of Mn-based oxide cathode for constructing super-stable sodium storage
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
The Mn-based oxide cathode with enriched crystal phase structure and component diversity can provide the excellent chemistry structure for Na-ion batteries.Nevertheless,the broad application prospect is obstructed by the sluggish Na+kinetics and the phase transitions upon cycling.Herein,we establish the thermodynamically stable phase diagram of various Mn-based oxide composites precisely controlled by sodium content tailoring strategy coupling with co-doping and solid-state reaction.The chemical environment of the P2/P'3 and P2/P3 biphasic composites indicate that the charge compensation mech-anism stems from the cooperative contribution of anions and cations.Benefiting from the no phase tran-sition to scavenge the structure strain,P2/P'3 electrode can deliver long cycling stability(capacity retention of 73.8％after 1000 cycles at 10 C)and outstanding rate properties(the discharge capacity of 84.08 mA h g-1 at 20 C)than P2/P3 electrode.Furthermore,the DFT calculation demonstrates that the introducing novel P'3 phase can significantly regulate the Na+reaction dynamics and modify the local electron configuration of Mn.The effective phase engineering can provide a reference for designing other high-performance electrode materials for Na-ion batteries.
Sodium ion batteryOxide cathodePhase engineeringPhase diagramNa+kinetic
Quanqing Zhao、Ruru Wang、Ming Gao、Bolin Liu、Jianfeng Jia、Haishun Wu、Youqi Zhu、Chuanbao Cao
展开 >
Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education,School of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030032,Shanxi,China
Metals and Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China
Research Center of Materials Science,Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications,Beijing Institute of Technology,Beijing 100081,China
National Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesShanxi Province Science Foundation for YouthsScientific and Technological Innovation Programs of Higher Education Institutions in ShanxiInstitute Foundation Project of China Academy of Railway Sciences Corporation Limited Metals and Chemistry Research Institute
NETL
NSTL
万方数据
