Enhanced alkali–metal ion storage performance of bimetallic selenide/N-doped carbon core–shell anodes

IF 13.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Hongjung Kim, Yuna Song, Minkyu Kim, Yunji Jeong, Moonsu Kim, Gibaek Lee
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Abstract

In this research, we developed a ZnSe@Co0.85Se heterojunction embedded in N-doped carbon (NC), derived from a zeolitic imidazolate framework (ZIF), for use in lithium-ion batteries (LIBs). The material, ZnSeNC@Co0.85SeNC, exhibited excellent cycling and rate performance, achieving capacities of 944.1 mAh/g at 1.0 A/g and 277.6 mAh/g at 10 A/g. Full-cell tests demonstrated its effectiveness, with a specific capacity of approximately 80 mAh/g, coulombic efficiency near 99 %, and capacity retention of 64 %, corresponding to power and energy densities of 97.2 W kg−1 and 224 Wh kg−1, respectively. We explored the capacity enhancement mechanisms, identifying factors such as activation of crystalline Se, formation of a Se-rich solid-electrolyte interface, and capacitive contributions from reduced metal particles. Computational studies indicated that these improvements were linked to the heterojunction interface of ZnSe, Co0.85Se, and NC. Additionally, the material’s potential for potassium-ion battery (PIB) applications was assessed, delivering 274.8 mAh/g at 1.0 A/g. This work not only advances our understanding of transition-metal selenides (TMSe) in battery applications but also proposes design strategies for TMSe-based materials for both LIB and PIB anodes.

Abstract Image

双金属硒化物/ n掺杂碳核-壳阳极增强碱金属离子存储性能
在这项研究中,我们开发了一种嵌入在n掺杂碳(NC)中的ZnSe@Co0.85Se异质结,该异质结来自沸石型米唑酸盐框架(ZIF),用于锂离子电池(lib)。该材料ZnSeNC@Co0.85SeNC表现出优异的循环和倍率性能,在1.0 A/g和10 A/g下的容量分别为944.1 mAh/g和277.6 mAh/g。全电池测试证明了其有效性,比容量约为80 mAh/g,库仑效率接近99 %,容量保持率为64 %,对应的功率和能量密度分别为97.2 W kg - 1和224 Wh kg - 1。我们探索了容量增强机制,确定了诸如晶体Se的活化,富Se固体电解质界面的形成以及还原金属颗粒的电容贡献等因素。计算研究表明,这些改进与ZnSe、Co0.85Se和NC的异质结界面有关。此外,还评估了该材料在钾离子电池(PIB)应用中的潜力,在1.0 A/g下可提供274.8 mAh/g。这项工作不仅促进了我们对过渡金属硒化物(TMSe)在电池应用中的理解,而且还提出了用于LIB和PIB阳极的基于TMSe的材料的设计策略。
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来源期刊
Chemical Engineering Journal
Chemical Engineering Journal 工程技术-工程:化工
CiteScore
21.70
自引率
9.30%
发文量
6781
审稿时长
2.4 months
期刊介绍: The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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