首页|A Novel NASICON-Type-Na3.5MnCr0.5Ti0.5(PO4)3 Nanofiber with Multi-electron Reaction for High-Performance Sodium-Ion Batteries

A Novel NASICON-Type-Na3.5MnCr0.5Ti0.5(PO4)3 Nanofiber with Multi-electron Reaction for High-Performance Sodium-Ion Batteries

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Sodium superionic conductors(NASICONs)show significant promise for application in the development of cathodes for sodium-ion batteries(SIBs).However,it remains a major challenge to develop the desired multi-electron reaction cathode with a high specific capacity and energy density.Herein,we report a novel NASICON-type-Na3.5MnCr0.5Ti0.5(PO4)3 cathode obtained by combining electrospinning and stepwise sintering processes.This cathode exhibits a high discharge capacity of 160.4 mAh-g-1 and operates at a considerable medium voltage of 3.2 V.The-Na3.5MnCr0.5Ti0.5(PO4)3 cathode undergoes a multi-electron redox reaction involving the-Cr3+/4+(4.40/4.31 V vs.Na/Na+),-Mn3+/4+(4.18/4.03 V),-Mn2+/3+(3.74/3.41 V),and-Ti3+/4+(2.04/2.14 V)redox couples.This redox reaction enables a three-electron transfer during the-Na+intercalation/de-intercalation processes.As a result,the-Na3.5MnCr0.5Ti0.5(PO4)3 demonstrates a significant enhancement in energy density,surpassing other recently reported SIB cathodes.The highly reversible structure evolution and small volume changes during cycling were demonstrated with in-situ X-ray diffraction,ensuring outstanding cyclability with 77%capacity retention after 500 cycles.Furthermore,a NMCTP@C//Sb@C full battery was fabricated,which delivered a high energy density of 421 Wh-kg-1 and exhibited good cyclability with 75.7%capacity retention after 100 cycles.The rational design of composition regu-lation with multi-metal ion substitution holds the potential to unlock new possibilities in achieving high-performance SIBs.

Sodium-ion batteryNASICON structureNa3.5MnTi0.5Cr0.5(PO4)3 nanofiberEx/in-situ characterizationMulti-electron reaction

Ting Zhu、Wei Liu、Xiaobin Liao、Mengyao Wang、Hao Fan、Zihe Wei、Congcong Cai、Liyan Yang、Mufang Li、Dong Wang、Ping Hu、Xuanpeng Wang

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Key Laboratory of Textile Fiber and Products,Ministry of Education,Hubei International Scientific and Technological Cooperation Base of Intelligent Textile,Materials&Application,Wuhan Textile University,Wuhan 430200,China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices,School of Microelectronics,Hubei University,Wuhan 430062,China

Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China

Department of Physical Science&Technology,School of Science,Wuhan University of Technology,Wuhan 430070,China

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2024

10.1007/s42765-023-00367-4

ISSN：
年,卷(期)：2024.6(2)