Core‐shell structured P2‐type layered cathode materials for long‐life sodium‐ion batteries
Huili Wang,
Jianing Qi,
Peixin Jiao,
Zhonghan Wu,
Ziheng Zhang,
Na Jiang,
Dongjie Shi,
Geng Li,
Zhenhua Yan,
Kai Zhang,
Jun Chen
Affiliations
Huili Wang
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Jianing Qi
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Peixin Jiao
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Zhonghan Wu
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Ziheng Zhang
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Na Jiang
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Dongjie Shi
High Performance Computing Department National Supercomputer Center in Tianjin Tianjin China
Geng Li
Key Laboratory of Rare Earths China Rare Earth Group Research Institute, Chinese Academy of Sciences Ganzhou China
Zhenhua Yan
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Kai Zhang
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Jun Chen
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Renewable Energy Conversion and Storage Center (RECAST), Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin China
Abstract P2‐type layered Ni–Mn‐based oxides are vital cathode materials for sodium‐ion batteries (SIBs) due to their high discharge capacity and working voltage. However, they suffer from the detrimental P2 → O2 phase transition induced by the O2−−O2− electrostatic repulsion upon high‐voltage charge, which leads to rapid capacity fade. Herein, we construct a P2‐type Ni–Mn‐based layered oxide cathode with a core‐shell structure (labeled as NM–Mg–CS). The P2‐Na0.67[Ni0.25Mn0.75]O2 (NM) core is enclosed by the robust P2‐Na0.67[Ni0.21Mn0.71Mg0.08]O2 (NM–Mg) shell. The NM–Mg–CS exhibits the phase‐transition‐free character with mitigated volume change because the confinement effect of shell is conductive to inhibit the irreversible phase transition of the core material. As a result, it drives a high capacity retention of 81% after 1000 cycles at 5 C with an initial capacity of 78 mA h/g. And the full cell with the NM–Mg–CS cathode and hard carbon anode delivers stable capacities over 250 cycles. The successful construction of the core‐shell structure in P2‐type layered oxides sheds light on the development of high‐capacity and long‐life cathode materials for SIBs.