Optimized diffusion pathways in hierarchically porous CoSe2@porous N-doped carbon for lithium and potassium storage

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-05-27 DOI:10.1016/j.micromeso.2025.113711

Hongjung Kim , Gyeongmin Kim , Nokeun Park , Misook Kang , Moonsu Kim , Gibaek Lee

引用次数: 0

Abstract

This study presents the synthesis of CoSe₂ embedded in a hierarchically porous nitrogen-doped carbon (CoSe₂@PNC) framework, developed via Zn-assisted pyrolysis and selenization. The porous structure enhances ion transport, increases active sites, and reduces electrode resistance, thereby significantly improving electrochemical performance. CoSe₂@PNC achieves outstanding lithium-ion storage with a capacity of 1600.7 mAh g⁻¹ at 0.2 A g⁻¹ after 150 cycles and 938.2 mAh g⁻¹ at 3.0 A g⁻¹, outperforming CoSe₂@NC. Furthermore, the enhanced diffusion benefits extend to potassium-ion storage, delivering 352.8 mAh g⁻¹ after 50 cycles at 0.2 A g⁻¹ with a higher pseudo-capacitive contribution. These findings underscore the potential of CoSe₂@PNC for next-generation batteries.

查看原文本刊更多论文

优化扩散途径在层次多孔CoSe2@porous氮掺杂碳的锂和钾的存储

本研究通过锌辅助热解和硒化制备了嵌套在分层多孔氮掺杂碳（CoSe2@PNC）框架中的CoSe2。多孔结构增强了离子输运，增加了活性位点，降低了电极电阻，从而显著提高了电化学性能。CoSe2@PNC实现了出色的锂离子存储，在0.2 ag−1时，150次循环后容量为1600.7 mAh g−1，在3.0 ag−1时容量为938.2 mAh g−1，优于CoSe2@NC。此外，增强的扩散效应扩展到钾离子存储，在0.2 A g−1下进行50次循环后，输出352.8 mAh g−1，具有更高的伪电容贡献。这些发现强调了CoSe2@PNC下一代电池的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.