青铜色
体积热力学
相(物质)
零(语言学)
质子
材料科学
插层(化学)
凝聚态物理
冶金
化学
物理
热力学
核物理学
无机化学
量子力学
语言学
哲学
作者
Kosuke Kawai,Seong‐Hoon Jang,Yuta Igarashi,Koji Yazawa,Kazuma Gotoh,Jun Kikkawa,Atsuo Yamada,Yoshitaka Tateyama,Masashi Okubo
标识
DOI:10.1002/anie.202410971
摘要
Managing safety and supply-chain risks associated with lithium-ion batteries (LIBs) is an urgent task for sustainable development. Aqueous proton batteries are attractive alternatives to LIBs because using water and protons addresses these two risks. However, most host materials undergo large volume changes upon H+ intercalation, which induces intraparticle cracking to accelerates parasitic reactions. Herein, we report that Mo3Nb2O14 bronze exhibits reversible H+ intercalation (200 mAh g-1) with a Coulombic efficiency of 99.7% owing to near-zero volume change and solid-solution-type phase transition. Combination of experimental and theoretical analyses clarifies that rotation and shrinkage of open tunnels, which consist of flexible corner-sharing Mo/NbOn polyhedra, relieve local structural distortions upon H+ intercalation to suppress intraparticle cracking. The prototype full cell of an aqueous proton battery with a Mo3Nb2O14 anode operates stably over 1000 charge/discharge cycles. This study reveals the importance of implementing distortion-relieving voids in host materials to reduce volume change upon charge/discharge.
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