Superparamagnetic Fe Conversion Induces MoS₂ Fast Ion Transport in Wide-Temperature-Range Sodium-Ion Batteries

Li, Zhenwei1,2; Han, Meisheng3; Wang, Jianlin4; Zhang, Leqing5; Yu, Peilun1; Li, Qiang5; Bai, Xuedong4; Yu, Jie1,2

2024-07-01

10.1002/adfm.202404263

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

MoS2 is widely reported as anode material for sodium-ion batteries (SIBs). However, its ability to operate effectively across a wide temperature range and at high rates continues to pose fundamental challenges, limiting its further development. Herein, a monolayer Fe-doped MoS2/N,O-codoped C overlapping structure is designed and employed as an anode for wide-temperature-range SIBs. Fe doping imparts MoS2 electrode with zero bandgap characteristics, an increased interlayer spacing, and low sodium-ion diffusion energy barriers across wide operation temperatures. Impressively, Fe atoms doped into the MoS2 lattice can be reduced to superparamagnetic Fe-0 nanocrystals of approximate to 2 nm during conversion reactions. In situ magnetometry reveals that these Fe-0 nanocrystals can be used as electron acceptor in the formation of space charge zones with Na+, thereby triggering strong spin-polarized surface capacitance that facilitates fast sodium-ion storage over a wide temperature range. Consequently, the designed MoS2 electrode demonstrates exceptional fast-charging capability in half/full cells operating at -40-60 degrees C. This study provides novel perspectives on the utilization of heteroatom doping strategies in conversion-type electrode material design and proves the effectiveness of spin-polarized surface capacitance effect on enhancing sodium-ion storage over a wide temperature range.

MoS2 sodium-ion batteries spin-polarized surface capacitance superparamagnetic Fe conversion wide operation temperatures

SCI ; EI

英语

通讯

National Natural Science Foundation of China["52172084","22179066"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001263172200001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Harbin Inst Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Semicond Optoelect Mat & In, Shenzhen Engn Lab Supercapacitor Mat, Shenzhen 518055, Peoples R China
2.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
5.Qingdao Univ, Weihai Innovat Res Inst, Inst Mat Energy & Environm, Coll Phys, Qingdao 266071, Peoples R China

Li, Zhenwei,Han, Meisheng,Wang, Jianlin,et al. Superparamagnetic Fe Conversion Induces MoS₂ Fast Ion Transport in Wide-Temperature-Range Sodium-Ion Batteries[J]. ADVANCED FUNCTIONAL MATERIALS,2024.

Li, Zhenwei.,Han, Meisheng.,Wang, Jianlin.,Zhang, Leqing.,Yu, Peilun.,...&Yu, Jie.(2024).Superparamagnetic Fe Conversion Induces MoS₂ Fast Ion Transport in Wide-Temperature-Range Sodium-Ion Batteries.ADVANCED FUNCTIONAL MATERIALS.

Li, Zhenwei,et al."Superparamagnetic Fe Conversion Induces MoS₂ Fast Ion Transport in Wide-Temperature-Range Sodium-Ion Batteries".ADVANCED FUNCTIONAL MATERIALS (2024).