Scholarlink

<p>NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NTP) is a material with a NASICON structure, a three-dimensional open type skeleton, and suitable negative voltage window, which is widely regarded as a magnetic anode material for aqueous sodium ion batteries (ASIBs). However, NTP’s intrinsically poor conductivity hampers their use in ASIBs. Herein, bimetallic doped carbon material was designed and combined with the sol–gel method to prepare NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>–C–FeNi (NTP–C–FeNi) composite materials. This bimetallic doped carbon composite NTP material not only has a large specific surface area, but also effectively improves conductivity and promotes rapid migration of Na<sup>+</sup>. Following the rate performance test, NTP–C–FeNi retained a reversible capacity of 116.75 mAh·g<sup>−1</sup> at 0.1 A·g<sup>−1</sup>, representing 95.9% of the first cycle capacity. After 500 cycles at 1.5 A·g<sup>−1</sup>, the cycle fixity was 85.3%. The enhancement of electrochemical performance may owe to the widening of pathways and acceleration of Na<sup>+</sup> insertion/extraction facilitated by FeNi–C doping, while the carbon coating effectively promotes electrode charge transfer. The results indicate that the bimetallic doped carbon composite NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> holds potential for practical applications in novel aqueous sodium ion battery systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sodium storage properties of Fe, Ni-bimetallic doped carbon-modified NaTi2(PO4)3

  • 期刊论文

  • 发表日期：

    2025年9月10日

查看全文
  • Junling Che,
  • Jiaojiao Yu,
  • Tong Xu,
  • Junchao Ma,
  • Kang Yu,
  • Jian Qin,
  • Wei Ren,
  • Yanmin Jia,
  • Xifei Li

摘要

NaTi2(PO4)3 (NTP) is a material with a NASICON structure, a three-dimensional open type skeleton, and suitable negative voltage window, which is widely regarded as a magnetic anode material for aqueous sodium ion batteries (ASIBs). However, NTP’s intrinsically poor conductivity hampers their use in ASIBs. Herein, bimetallic doped carbon material was designed and combined with the sol–gel method to prepare NaTi2(PO4)3–C–FeNi (NTP–C–FeNi) composite materials. This bimetallic doped carbon composite NTP material not only has a large specific surface area, but also effectively improves conductivity and promotes rapid migration of Na+. Following the rate performance test, NTP–C–FeNi retained a reversible capacity of 116.75 mAh·g−1 at 0.1 A·g−1, representing 95.9% of the first cycle capacity. After 500 cycles at 1.5 A·g−1, the cycle fixity was 85.3%. The enhancement of electrochemical performance may owe to the widening of pathways and acceleration of Na+ insertion/extraction facilitated by FeNi–C doping, while the carbon coating effectively promotes electrode charge transfer. The results indicate that the bimetallic doped carbon composite NaTi2(PO4)3 holds potential for practical applications in novel aqueous sodium ion battery systems.