宝子们，今天要给大家分享一个超厉害的科研成果！在电池界，钠离子电池一直被视为锂离子电池的潜力替代者。毕竟钠元素储量丰富又便宜，成本优势那是相当明显。但是呢，它一直有个大难题，就是缺少既容量高又稳定的电极材料，这严重限制了它的实际应用😔。不过别担心，科学家们出手了！他们把晶格应变和硫空位效应结合起来，用在了硫化亚锡/还原氧化石墨烯复合材料上。简单讲，晶格应变就像给材料“施了魔法”，硫空位则是材料里的特殊“小机关”。这俩一配合，能让钠离子在材料表面和边缘附近快速地嵌入和脱出，大大提升了材料的储钠能力🤩。经过处理的复合材料性能简直逆天！在1A/g的电流密度下，可逆容量能达到511.82mAh/g；在3A/g的高电流密度下，还有450.60mAh/g的容量。这意味着钠离子电池离大规模应用又近了一步🥰。这次研究给改善钠离子电池性能提供了超棒的策略，相信未来钠离子电池会给我们带来更多惊喜！

期刊

Energy & Environmental Materials

标题

Coupling Lattice Strain and Sulfur Vacancy in Tin Monosulfide/Reduced Graphene Oxide Composite for High-Performance Sodium-Ion Storage

作者

Yitong Jiang, Yihong Zheng, Lijuan Tong, Kun Zuo, Mulan Tu, Shihong Chen, Xiaochuan Chen, Junxiong Wu, Qinghua Chen, Xiaoyan Li, Yuming Chen

摘要

Sodium-ion batteries have garnered significant attention as a cost-effective alternative to lithium-ion batteries due to the abundance and affordability of sodium precursors. However, the lack of suitable electrode materials with both high capacity and excellent stability continues to hinder their practical viability. Herein, we couple lattice strain and sulfur deficiency effects in a tin monosulfide/reduced graphene oxide composite to enhance sodium storage performance. Experimental results and theoretical calculations reveal that the synergistic effects of lattice strain and sulfur vacancies in tin monosulfide promote rapid (de)intercalation near the surface/edge of the material, thereby enhancing its pseudocapacitive sodium storage properties. Consequently, the strained and defective tin monosulfide/reduced graphene oxide composite demonstrates a high reversible capacity of 511.82 mAh g−1 at 1 A g−1 and an outstanding rate capability of 450.60 mAh g−1 at 3 A g−1. This study offers an effective strategy for improving sodium storage performance through lattice strain and defect engineering.

原文链接

https://onlinelibrary.wiley.com/doi/10.1002/eem2.12891

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静远嘲风（MY Scimage） 成立于2007年，嘲风取自中国传统文化中龙生九子，子子不同的传说，嘲风为守护屋脊之瑞兽，喜登高望远；静远取自成语“宁静致远”，登高莫忘初心，远观而不可务远。

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