A Versatile Strategy for Achieving Fast-Charging Batteries via Interfacial Engineering: Pseudocapacitive Potassium Storage without Nanostructuring

被引:18
作者
Kim, Seoa [1 ]
Jung, Hyeonjung [2 ]
Lim, Won-Gwang [1 ]
Lim, Eunho [3 ]
Jo, Changshin [4 ]
Lee, Kug-Seung [5 ]
Han, Jeong Woo [2 ]
Lee, Jinwoo [1 ]
机构
[1] Korea Adv Inst Sci & Technol KAIST, Chem & Biomol Engn, 291 Daehak Ro, Daejeon 34141, South Korea
[2] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea
[3] Korea Res Inst Chem Technol KRICT, Carbon Resources Inst, Daejeon 34114, South Korea
[4] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous & Energy Mat Technol GIFT, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea
[5] Pohang Univ Sci & Technol POSTECH, Pohang Accelerator Lab PAL, Beamline Dept, Pohang 37673, South Korea
基金
新加坡国家研究基金会;
关键词
fast-charging; interfacial engineering; ionic highway; potassium-ion batteries; ION BATTERIES; INTERCALATION; LITHIUM; ANODES; MECHANISM; SODIUM;
D O I
10.1002/smll.202202798
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The rapid transport of alkali ions in electrodes is a long-time dream for fast-charging batteries. Though electrode nanostructuring has increased the rate-capability, its practical use is limited because of the low tap density and severe irreversible reactions. Therefore, development of a strategy to design fast-charging micron-sized electrodes without nanostructuring is of significant importance. Herein, a simple and versatile strategy to accelerate the alkali ion diffusion behavior in micron-sized electrode is reported. It is demonstrated that the diffusion rate of K+ ions is significantly improved at the hetero-interface between orthorhombic Nb2O5 (001) and monoclinic MoO2 (110) planes. Lattice distortion at the hetero-interface generates an inner space large enough for the facile transport of K+ ions, and electron localization near oxygen-vacant sites further enhances the ion diffusion behavior. As a result, the interfacial-engineered micron-sized anode material achieves an outstanding rate capability in potassium-ion batteries (KIBs), even higher than nanostructured orthorhombic Nb2O5 which is famous for fast-charging electrodes. This is the first study to develop an intercalation pseudocapacitive micron-sized anode without nanostructuring for fast-charging and high volumetric energy density KIBs. More interestingly, this strategy is not limited to K+ ion, but also applicable to Li+ ion, implying the versatility of interfacial engineering for alkali ion batteries.
引用
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页数:12
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