Controlled establishment of advanced local high-entropy NiCoMnFe-based layered double hydroxide for zinc batteries and low-temperature supercapacitors

Xiaohui Guan, Xinyu Fan, Enze Zhu, Jiqing Zhang, Liu Yang (Corresponding author), Penggang Yin, Xin Guan (Corresponding author), Guangsheng Wang (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

The development of high-performance electrodes is essential for improving the charge storage performance of rechargeable devices. In this study, local high-entropy C, N co-doped NiCoMnFe-based layered double hydroxide (C/N-NiCoMnFe-LDH, C/N-NCMF) were designed using a novel method. Multi-component synergistic effects can dramatically modulate the surface electron density, crystalline structure, and band-gap of the electrode. Thus, the electrical conductivity, electron transfer, and affinity for the electrolyte can be optimized. Additionally, the C/N-NCMF yielded a high specific capacitance (1454F·g−1) at 1 A·g−1. The electrode also exhibited excellent cycling stability, with 62 % capacitance retention after 5000 cycles. Moreover, the assembled Zn||C/N-NCMF battery and the C/N-NCMF//AC hybrid supercapacitor yielded excellent energy densities of 63.1 and 35.4 Wh·kg−1 at power densities of 1000 and 825 W·kg−1, and superior cycling performance with 69 % and 88.7 % capacitance retention after 1000 and 30,000 cycles, respectively. Furthermore, the electrode maintained high electrochemical activity and stability and ensured high energy density, power density, and cycling stability of the rechargeable devices even at a low temperature (−20 °C). This study paves a new pathway for regulating the electrochemical performance of LDH-based electrodes.

Original languageEnglish
Pages (from-to)952-965
Number of pages14
JournalJournal of Colloid and Interface Science
Volume658
DOIs
Publication statusPublished - 15 Mar 2024

Funding

The authors acknowledge the funding support from the National Natural Science Foundation of China (Grant No. 51972049 , 52202217 ), the Jilin Province Development and Reform Commission (Grant No. 2021C040-4 ), the Natural Science Foundation of Jilin Province (Grant No. YDZJ202201ZYTS375 ), and the Science and Technology Research Project of Jilin Education Department (Grant No. JJKH20210104KJ ).

FundersFunder number
Science and Technology Research Project of Jilin Education DepartmentJJKH20210104KJ
Natural Science Foundation of Jilin ProvinceYDZJ202201ZYTS375
Jilin Province Development and Reform Commission2021C040-4
National Natural Science Foundation of China52202217, 51972049

    Keywords

    • High electrochemical activity and stability
    • Local high-entropy C/N-NiCoMnFe-LDH
    • Low-temperature supercapacitors
    • Zinc batteries

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