DataVXSmall StructuresPaper
journal article·2024-05Open access

Bimetal‐Substituted Polyanion Cathode for Sodium‐Ion Batteries: Less Vanadium and Boosted Low‐Temperature Kinetics

Shitan Xu, Wensun Zhu, Yang Yang, Yu Yao, Ghulam Ali, Xianghua Zhang, Xianhong Rui, Yan Yu

Small Structures· Volume 5· Issue 5
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Source abstract

Abstract

Sodium‐ion batteries (SIBs) have emerged as an attractive alternative for large‐scale energy storage due to their low cost and high safety. The selection of cathode materials, which determine SIB performance, becomes a crucial aspect. Vanadium‐based phosphates are known for their multielectron transfer properties and stable structure, but their intrinsic electronic conductivity is limited. In this regard, bimetallic substitution is an excellent modification method for improving the conductivity property. Herein, a novel Na4VMn0.7Ni0.3(PO4)3@C (NVMNP@C) cathode with less vanadium is designed for SIBs, which exhibits outstanding electrochemical performance at 25 °C, delivering rate capacity of 67 mA h g−1 at 3 A g−1, and long‐term cyclability of remaining 74.6% after 4800 cycles at 2 A g−1. Furthermore, excellent low‐temperature adaptability (82 mA h g−1 at 20 mA g−1, 60 mA h g−1 at 400 mA g−1, and 90.4% capacity retention after 230 cycles at 100 mA g−1) at −40 °C is also achieved. This unique work has broken a feasible pathway for high‐performance SIB cathode at low temperature.
Source: crossref · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China

Hefei National Research Center for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Hefei Anhui 230026 China

U.S.‐Pakistan Center for Advanced Studies in Energy National University of Sciences and Technology Islamabad 44000 Pakistan

School of Materials Science and Engineering Liaocheng University Liaocheng 252000 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province

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