首页|High-lattice-adapted surface modifying Na4MnV(PO4)3 for better sodium storage

High-lattice-adapted surface modifying Na4MnV(PO4)3 for better sodium storage

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Sodium-ion batteries(SIBs)are required to possess long cycle life when used for large-scale energy storage.The polyanionic Na4MnV(PO4)3(NMVP)reveals good cyclic stability due to its unique three-dimensional(3D)frame structure,but it still faces the challenge of interfacial degradation in practical applications.In this work,NASICON-type Na1.3Al0.7Ti1.3(PO4)3(NATP)was deposited on the surface of NMVP to promote interface stability by surface modification and gradient doping.As a result,the optimized NMVP@2％NATP released a capacity retention of 44.8％after 1000 cycles at 5 C,much higher than that of the initial NMVP(28.9％).The enhanced electrochemical performance was mainly attributed to NATP coating acting as a fast ion transport carrier and physical barrier,significantly facilitating the Na+diffusion and isolating side reaction at the electrode/electrolyte interface.On the other hand,Ti4+and Al3+cations from the NATP were partially doped inside the NMVP surface to boost the transport of Na+,and the perfect lattice matching of NVMP and NATP improved the interface and structural stability accompanying long cycling.This work demonstrated the effectiveness of surface modification with high lattice match material and provided new perspectives for high energy density solid-state SIBs.

high-lattice-adaptedcathodesurface modificationsodium-ion batteries

Chongran Song、Shiyu Li、Ying Bai

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International Joint Research Laboratory of New Energy Materials and Devices of Henan Province,School of Physics and Electronics,Academy for Advanced Interdisciplinary Studies,Henan University,Kaifeng 475004,China

National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)Foundation of Henan Educational CommitteeZhongyuan Thousand Talents Program of Henan ProvinceHenan Overseas Expertise Introduction Center for Discipline InnovationProgram for Innovative Research Team in Science and Technology in the University of Henan ProvinceScience and Technology Development Project of Henan Province

52102239520721125167206922A140003ZYQR201912155CXJD202100320IRTSTHN012202102210105

2024

10.1007/s12274-023-6164-2

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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