Mechanistic Insights into the Structural Modulation of Transition Metal Selenides to Boost Potassium Ion Storage Stability,ACS Nano

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Mechanistic Insights into the Structural Modulation of Transition Metal Selenides to Boost Potassium Ion Storage Stability
ACS Nano ( IF 15.8 ) Pub Date : 2021-09-10 , DOI: 10.1021/acsnano.1c04493
Shuaitong Liang ₁ , Zhenjiang Yu ₂ , Tianshuai Ma ₁ , Haiting Shi ₁ , Qingqing Wu ₁ , Lijie Ci ₃ , Yujin Tong ₄ , Jiajun Wang ₂ , Zhiwei Xu ₁

Affiliation

Atomic-level structure engineering is an effective strategy to reduce mechanical degradation and boost ion transport kinetics for battery anodes. To address the electrode failure induced by large ionic radius of K⁺ ions, herein we synthesized Mn-doped ZnSe with modulated electronic structure for potassium ion batteries (PIBs). State-of-the-art analytical techniques and theoretical calculations were conducted to probe crystalline structure changes, ion/electron migration pathways, and micromechanical stresses evolution mechanisms. We demonstrate that the heterogeneous adjustment of the electronic structure can relieve the potassiumization-induced internal strain and improve the structural stability of battery anodes. Our work highlights the importance of the correlation between doping chemistry and mechanical stability, inspiring a pathway of structural engineering strategy toward a highly stable PIBs.

中文翻译：

对过渡金属硒化物的结构调制以提高钾离子储存稳定性的机理洞察

原子级结构工程是减少机械退化和促进电池阳极离子传输动力学的有效策略。解决大离子半径 K ⁺引起的电极失效问题离子，在此我们合成了具有调制电子结构的锰掺杂 ZnSe，用于钾离子电池（PIB）。进行了最先进的分析技术和理论计算，以探测晶体结构变化、离子/电子迁移途径和微机械应力演化机制。我们证明了电子结构的异质调整可以减轻钾化引起的内部应变并提高电池负极的结构稳定性。我们的工作强调了掺杂化学与机械稳定性之间相关性的重要性，激发了结构工程策略通往高度稳定 PIB 的途径。

更新日期：2021-09-28

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