首页|Aluminum ion chemistry of Na4Fe3(PO4)2(P2O7)for all-climate full Na-ion battery

Aluminum ion chemistry of Na4Fe3(PO4)2(P2O7)for all-climate full Na-ion battery

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Na4Fe3(PO4)2(P2O7)(NFPP)is currently drawing increased attention as a sodium-ion batteries(SIBs)cath-ode due to the cost-effective and NASICON-type structure features.Owing to the sluggish electron and Na+conductivities,however,its real implementation is impeded by the grievous capacity decay and infe-rior rate capability.Herein,multivalent cation substituted microporous Na3.9Fe2.9Al0.1(PO4)2(P2O7)(NFAPP)with wide operation-temperature is elaborately designed through regulating structure/interface coupled electron/ion transport.Greatly,the derived Na vacancy and charge rearrangement induced by trivalent Al3+substitution lower the ions diffusion barriers,thereby endowing faster electron transport and Na+mobility.More importantly,the existing Al-O-P bonds strengthen the local environment and alleviate the volume vibration during(de)sodiation,enabling highly reversible valence variation and structural evolution.As a result,remarkable cyclability(over 10,000 loops),ultrafast rate capability(200 C),and exceptional all-climate stability(-40-60 ℃)in half/full cells are demonstrated.Given this,the rational work might provide an actionable strategy to promote the electrochemical property of NFPP,thus unveiling the great application prospect of sodium iron mixed phosphate materials.

Multivalent cation substitutionAll-climateNa+ mobilityUltrafast rate capability

Jinqiang Gao、Jingyao Zeng、Weishun Jian、Yu Mei、Lianshan Ni、Haoji Wang、Kai Wang、Xinyu Hu、Wentao Deng、Guoqiang Zou、Hongshuai Hou、Xiaobo Ji

展开 >

College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

国家自然科学基金国家自然科学基金国家自然科学基金Science and Technology Foundation of Guizhou Province中央高校基本科研业务费专项中南大学项目中央高校基本科研业务费专项中南大学项目U19 station in the National Synchrotron Radiation Laboratory(NSRL)

5232540552261135632U21A20284QKHZC[2020]2Y0372023XQLH0702023XQLH069

2024

10.1016/j.scib.2024.01.026

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(6)
  • 53