Reversible potassium-ion alloying storage in crystalline silicene
Reversible potassium-ion alloying storage in crystalline silicene
复制标题
晶体硅烯中可逆钾离子合金储存
DOI：
10.1016/j.cej.2022.134961
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发表时间：
2022-05
影响因子：
15.1
通讯作者：
Daming Zhu
中科院分区：
文献类型：
--
作者：
Yuanhe Sun;Yuanxin Zhao;Zhaofeng Liang;Hui Lin;Zhiguo Ren;Zeying Yao;Yaru Yin;Ping Huai;Ke Yang;Jinyou Lin;Yaobo Huang;Wen Wen;Xiaolong Li;Renzhong Tai;Daming Zhu
成功地制备了Zintl相化合物衍生的柔性单层硅烯纳米片，通过高度可逆的K-Si合金化反应，激发了晶体硅在钾离子存储中超过3000次循环的性能。·晶体硅在钾离子电池中的性能被点燃。·来自Zintl相化合物的硅烯加速反应动力学。通过原位XRD和TEM证实KSi为放电产物。·在Si//K电池中实现了可靠的可逆容量（超过3000次循环）。硅是锂/钠离子电池最具吸引力的合金化阳极材料之一。然而，迄今为止生产的钾离子电池中仍然缺少K-Si合金化反应，即使理论相图允许存在相应的产物。本文中，我们从Zintl相CaSi 2合成结晶硅烯，并证明钾离子可以有效地插入/提取其中，具有增强的循环稳定性（在硅烯//K电池中超过3000次循环而没有容量衰减，库仑效率保持在99.4%以上）。与已建立的“惰性硅”的概念相反，硅烯中发生的可逆动力学控制的K-Si相变通过原位同步加速器X射线衍射来说明，并且能够形成KSi作为主要放电产物，实现可靠的可逆钾化存储容量180.1 mA h g −1。在这里观察到的硅的多功能合金电化学有望刺激持久的钾离子电池的发展。
Flexible monolayer silicene nanosheet derived from Zintl phase compound is successfully prepared, which ignited the performance of crystalline silicon in potassium-ion storage by highly reversible K-Si alloying reaction for more than 3000 cycles. • The performance of crystalline silicon in potassium-ion batteries is ignited. • Silicene derived from Zintl phase compound accelerates the reaction kinetics. • KSi was confirmed as the discharge product by in situ XRD and TEM. • Reliable reversible capacity (more than 3000 cycles) is realized in Si//K battery. Silicon has been recognized as one of the most appealing alloying anode materials for lithium/sodium-ion storage. However, the K-Si alloying reaction is still missing in potassium-ion batteries produced so far, even though the theoretical phase diagram allows the existence of corresponding products. Herein, we synthesize crystalline silicene from Zintl phase CaSi 2 and demonstrate that potassium-ions can be inserted/extracted efficiently in it with enhanced cycle stability (without capacity fading over 3000 cycles in silicene//K battery with Coulombic efficiency remains above 99.4 %). Contrary to established perceptions of “inert silicon”, the reversible kinetics-controlled K-Si phase transition occurring in silicene is illustrated by in situ synchrotron X-ray diffraction, and enables the formation of KSi as the dominant discharged product realizing a reliable reversible potassiation storage capacity of 180.1 mA h g −1 . The versatile alloying electrochemistry of silicon observed here is expected to spur the development of durable potassium-ion batteries.
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DOI：
10.1021/j100023a033
发表时间：
1995-06
期刊：
The Journal of Physical Chemistry
影响因子：
--
作者：
M. V. Buuren;F. Voermans;H. Kempen
通讯作者：
M. V. Buuren;F. Voermans;H. Kempen
影响因子：
29.4
作者：
Yunsong Wang;Zhipeng Wang;Yijun Chen;Hui Zhang;M. Yousaf;Huaisheng Wu;Mingchu Zou;A. Cao
通讯作者：
Yunsong Wang;Zhipeng Wang;Yijun Chen;Hui Zhang;M. Yousaf;Huaisheng Wu;Mingchu Zou;A. Cao
影响因子：
3.7
作者：
Cinquanta, Eugenio;Scalise, Emilio;Molle, Alessandro
通讯作者：
Molle, Alessandro
影响因子：
10.9
作者：
Sun, Yuanhe;Zhu, Daming;Tai, Renzhong
通讯作者：
Tai, Renzhong
DOI：
10.1002/zaac.19613130108
发表时间：
1961-01-01
影响因子：
1.4
作者：
BUSMANN, E
通讯作者：
BUSMANN, E