材料科学
双金属片
氮化碳
阳极
硫化物
电化学
镍
氢氧化物
氮化物
化学工程
硫化镍
阴极
碳纤维
无机化学
电极
纳米技术
催化作用
复合数
化学
冶金
物理化学
复合材料
有机化学
金属
工程类
光催化
图层(电子)
作者
Jang Mee Lee,Rohan Bahadur,Showkat H. Mir,Ian Chirchir Bargoria,Vibin Perumalsamy,Ajanya M. Ruban,Xiaojiang Yu,Mark B. H. Breese,Jiabao Yi,Sudip Chakraborty,Ajayan Vinu
出处
期刊:Small
[Wiley]
日期:2023-12-10
被引量:1
标识
DOI:10.1002/smll.202304587
摘要
Abstract Sodium‐ion batteries (SIBs) have received tremendous attention owing to their low cost, high working voltages, and energy density. However, the design and development of highly efficient SIBs represent a great challenge. Here, a unique and reliable approach is reported to prepare carbon nitride (CN) hybridized with nickel iron sulfide (NFCN) using simple reaction between Ni–Fe layered double hydroxide and dithiooxamide. The characterization results demonstrate that the hybridization with optimal amount of CN induces local distortion in the crystal structure of the hybrid, which would benefit SIB performance. Systematic electrochemical studies with a half‐cell configuration show that the present hybrid structure exhibits a promising reversible specific capacity of 348 mAh g −1 at 0.1 A g −1 after 100 cycles with good rate capability. Simulation result reveals that the iron atoms in nickel iron sulfide act as a primary active site to accommodate Na + ions. At last, with a full cell configuration using NFCN and Na 3 V 2 (PO 4 ) 2 O 2 F as the anode and cathode, respectively, the specific capacity appears to be ≈95 mAh g −1 after 50 cycles at 0.1 A g −1 condition. This excellent performance of these hybrids can be attributed to the synergistic effect of the incorporated CN species and the high conductivity of nickel–iron sulfide.
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