Advanced Multifunctional Sodium-Ion Battery with High Current Conversion, Long Cycle Life, and All-Climate Temperature Range by Dual-Multivalent Cation Doping Strategy

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2025-05-05 DOI:10.1002/aenm.202500471

Xin-Yuan Wang, Ze-Xi Sun, Wei Lv, Zi-Han Zhan, Miao Huang, Qian Wang, Fan Zhang, Hui Wang, Xiao-Jie Liu

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Abstract

The polyanionic fluorophosphate Na₃V₂(PO₄)₂O₂F is regarded as one of the most prospective cathode materials for high-energy-density sodium-ion batteries (SIBs), owing to its high operating voltage and ideal theoretical specific capacity. Nevertheless, its low kinetics significantly restrict its electrochemical performance and practical applications. In this paper, a novel bimetallic-doped cathode material, Na₃V_1.90Ti_0.05Cr_0.05(PO₄)₂O₂F (NVTC), based on V-site multivalent cations, is developed. When used as a cathode material in sodium-ion half batteries, it can be stably cycled for 3000 cycles with a capacity maintenance ratio of 96.88% at an ultra-high current density of 20 C. Furthermore, replacing the ether electrolyte allows NVTC to cycle stably for 150 cycles with an average Coulombic efficiency of 98.34% under harsh conditions of −15 °C (1 C current density). Moreover, NVTC exhibits a preliminary specific capacity of 110.5 mAh g⁻¹ at 50 °C and can operate stably for 2500 cycles (5 C current density). Remarkably, NVTC demonstrates ultra-fast charging capability (full charge in just 1.21 min at 30 C current density) and a low self-discharge rate (0.006318 V h⁻¹), alongside considerable electrochemical performance for high-quality loads. This study is expected to positively impact the future development of advanced multifunctional SIBs.

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采用双多价阳离子掺杂技术制备高电流转换、长循环寿命、全天候温度范围的新型多功能钠离子电池

聚阴离子氟磷酸Na3V2(PO4)2O2F由于具有较高的工作电压和理想的理论比容量，被认为是高能量密度钠离子电池（sib）最有前途的正极材料之一。然而，它的低动力学极大地限制了它的电化学性能和实际应用。本文研制了一种基于v位多价阳离子的新型双金属掺杂正极材料Na3V1.90Ti0.05Cr0.05(PO4)2O2F （NVTC）。作为钠离子半电池正极材料，在20℃的超高电流密度下，NVTC可稳定循环3000次，容量维持率为96.88%。此外，替代乙醚电解质，NVTC可在- 15℃（1℃电流密度）的恶劣条件下稳定循环150次，平均库仑效率为98.34%。此外，NVTC在50°C时的初步比容量为110.5 mAh g−1，可以稳定运行2500次（5°C电流密度）。值得注意的是，NVTC具有超快充电能力（在30℃电流密度下，充满电仅需1.21分钟）和低自放电率（0.006318 V h- 1），以及高质量负载下的可观电化学性能。该研究有望对未来先进多功能sib的发展产生积极影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.