A Universal Strategy for Constructing Seamless Graphdiyne on Metal Oxides to Stabilize the Electrochemical Structure and Interface
A Universal Strategy for Constructing Seamless Graphdiyne on Metal Oxides to Stabilize the Electrochemical Structure and Interface
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DOI：
10.1002/adma.201806272
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发表时间：
2018-12
影响因子：
29.4
通讯作者：
Fan Wang;Z. Zuo;Liang Li;Feng He;Fushen Lu;Yuliang Li
中科院分区：
文献类型：
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作者：
Fan Wang;Z. Zuo;Liang Li;Feng He;Fushen Lu;Yuliang Li
金属氧化物（MO）的结构和界面稳定性是电化学应用（包括锂离子电池（LIB）、超级电容器和催化剂）中面临体积变化和强烈界面极化的关键问题。在具有复杂尺寸的MO上生长无缝的全碳界面层不仅是一个科学问题，也是这些领域的实际挑战。在这里，在超温和条件下的石墨二炔的生长成功地实现了原位涂覆复杂尺寸的MO。同时形成无缝的全碳界面和导电网络。这种方法巧妙地避免了在传统碳材料存在下MO在高温下的结构降解。在高质量石墨二炔层的保护下，作为LIB阳极的样品在库仑效率、容量、长期保留以及结构和界面稳定性方面具有高性能。实验结果和理论计算都表明石墨二炔是一种特殊的保护膜，对防止电极的结构和界面退化起着至关重要的作用。此外，该方法的普适性将促进许多有前途的MO在其他电化学领域的潜在应用。
The structural and interfacial stabilities of metal oxides (MOs) are key issues while facing the volumetric variation and intensive interfacial polarization in electrochemical applications, including lithium‐ion batteries (LIBs), supercapacitors, and catalysts. The growth of a seamless all‐carbon interfacial layer on MOs with complex dimensions is not only a scientific problem, but also a practical challenge in these fields. Here, the growth of graphdiyne under ultramild condition is successfully implemented in situ for coating MOs of complex dimensions. The seamless all‐carbon interface and conductive network are formed at the same time. This method cleverly avoids the structural degradation of MOs at a high temperature in the presence of traditional carbon materials. Under the protection of the high‐quality graphdiyne layer, the samples as LIB anodes deliver high performances in terms of Coulomb efficiency, capacity, long‐term retention, and structural and interfacial stabilities. Both experimental achievements and theoretical calculations demonstrate that the graphdiyne is a particular protection layer for MOs and plays a crucial role for preventing the structural and interfacial degradation of the electrode. Furthermore, the universality of this method will promote the potential applications of many promising MOs in other electrochemical fields.