Ultramicropore-Confined Solvation and Interphase Regulation Unlock High-Performance Hard Carbon Anodes for Sodium-Ion Batteries

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2026-07-27 DOI:10.1007/s40820-026-02300-x

Shunyuan Tan, Zhiyuan Cheng, Jiahao Xing, Jingkai Gao, Zimo Huang, Hongshuai Hou, Zhongliang Tian, Yanqing Lai, Jie Li, Simin Li, Xiaobo Ji

{"title":"Ultramicropore-Confined Solvation and Interphase Regulation Unlock High-Performance Hard Carbon Anodes for Sodium-Ion Batteries","authors":"Shunyuan Tan, Zhiyuan Cheng, Jiahao Xing, Jingkai Gao, Zimo Huang, Hongshuai Hou, Zhongliang Tian, Yanqing Lai, Jie Li, Simin Li, Xiaobo Ji","doi":"10.1007/s40820-026-02300-x","DOIUrl":null,"url":null,"abstract":"<div><h2>Highlights</h2><div>\n \n <ul>\n <li>\n <p>An iodine-mediated oxidative cross-linking strategy enables the synthesis of spherical hard carbon with uniformly distributed ultramicropores (< 0.9 nm) and carbonyl-rich surfaces from starch precursors.</p>\n </li>\n <li>\n <p>Ultramicropore-confined solvation favors anion-enriched electrolyte structures, while carbonyl groups promote NaF-rich inorganic interphases, enabling synergistic interfacial regulation.</p>\n </li>\n <li>\n <p>The optimized hard carbon delivers high initial Coulombic efficiency (88.4%), large plateau contribution (64.1%), excellent rate capability (288.9 mAh g<sup>−1</sup> at 5C), and stable cycling (95.6% retention after 200 cycles)</p>\n </li>\n </ul>\n </div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"19 1","pages":""},"PeriodicalIF":36.3000,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-026-02300-x.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano-Micro Letters","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s40820-026-02300-x","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Engineering","Score":null,"Total":0}

引用次数: 0

Abstract

Highlights

An iodine-mediated oxidative cross-linking strategy enables the synthesis of spherical hard carbon with uniformly distributed ultramicropores (< 0.9 nm) and carbonyl-rich surfaces from starch precursors.
Ultramicropore-confined solvation favors anion-enriched electrolyte structures, while carbonyl groups promote NaF-rich inorganic interphases, enabling synergistic interfacial regulation.
The optimized hard carbon delivers high initial Coulombic efficiency (88.4%), large plateau contribution (64.1%), excellent rate capability (288.9 mAh g⁻¹ at 5C), and stable cycling (95.6% retention after 200 cycles)

查看原文本刊更多论文

超微孔限制溶剂化和界面调节解锁高性能硬碳阳极钠离子电池。

硬碳（HC）阳极在钠离子电池中很有前途，但由于对微纳米结构和界面化学控制不足，实现高初始库仑效率（ICE）、大平台贡献和快速电荷转移动力学仍然是一个挑战。在这里，我们提出了一种前体水平的分子工程策略，同时调节HC中的钠脱溶和间相化学。碘介导的氧化交联过程将淀粉转化为具有均匀分布的超微孔和富含羰基表面的球形HC。这些纳米孔被认为是分子筛，优先排除大体积的溶剂分子，同时允许PF6-协调的Na+进入，从而有利于在限制下富集阴离子的电解质结构。表面羰基表现出较强的PF6-亲和性，这可能促进孔隙表面富氟无机界面的形成。阴离子选择性吸附和受限脱溶的协同作用有利于外表面和纳米受限孔区域内薄而坚固的富钠界面，有助于可逆的界面反应和快速的Na+储存动力学。因此，HC提供了88.4%的ICE，在0.1C时可逆容量为352.9 mAh g-1，出色的倍率容量（5C时288.9 mAh g-1），超过200次循环的容量保持率为95.6%。这项工作提供了一种分子水平的设计范式，整合了HC阳极的效率、容量和动力学。

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

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.