Improved Na(+)/K(+) Storage Properties of ReSe(2)-Carbon Nanofibers Based on Graphene Modifications.
Improved Na(+)/K(+) Storage Properties of ReSe(2)-Carbon Nanofibers Based on Graphene Modifications.
复制标题
基于石墨烯改性的ReSe2-碳纳米纤维改善Na/K存储性能
DOI：
10.1007/s40820-019-0248-2
复制
发表时间：
2019-03-11
影响因子：
26.6
通讯作者：
Zhang M
中科院分区：
文献类型：
--
作者：
Liao Y;Chen C;Yin D;Cai Y;He R;Zhang M
石墨烯的修饰有效地提高了导电性，但也导致了对其直径减小的调节作用。石墨烯和碳纤维的协同作用保护了电极材料的结构，缩短了离子扩散路径。ReSe2@G@CNFS在Na+/K+半细胞中表现出高容量和长周期稳定性。当该化合物组装在Na+全电池中时，电池表现出良好的性能。本文的在线版本(10.1007/s408200190248-2)包含补充材料，可供授权用户使用。二硒化Re(ReSe2)化合物及其复合材料存在比容量低、循环稳定性差等问题，在储能领域引起了广泛的关注。在本研究中，通过简单的静电纺丝和热处理，成功地合成了包裹在碳纳米纤维中的ReSe2纳米粒子。结果表明，石墨烯修饰对ReSe_2-碳纳米纤维的微观结构和电化学性能有较大影响。相应地，修饰后的化合物在200mA−1下对Na+存储500次循环后容量为227mAhg−1，在200 mA−1下200次循环后容量为230mAhg−1，在500 mA−1下进行150次循环后容量保持为212mAhg−1，对应的容量保持率分别为89%、97%和86%。即使在Na+满电池中，其容量在1C(117万mA g−1)下循环200次后仍保持在82%。ReSe2-碳纳米纤维的优异稳定性得益于ReSe2极弱的van der Waals相互作用和较大的层间距，以及石墨烯修饰的碳纳米纤维在缩短电子/离子传输路径和改善结构支撑方面的作用。这项研究可能会为更广泛的应用提供一条新的途径。本文的在线版本(10.1007/s408200190248-2)包含补充材料，可供授权用户使用。
Graphene modifications effectively improved conductivity but also resulted in a regulatory effect on the decrease in its diameter. The synergistic action of graphene and carbon fibers protected the structure of the electrode material and shortened the ion diffusion path. ReSe2@G@CNFs exerted high capacity and long cyclic stability in Na+/K+ half cells. When this compound was assembled in Na+ full cells, the cells displayed excellent performances The online version of this article (10.1007/s40820-019-0248-2) contains supplementary material, which is available to authorized users. Rhenium diselenide (ReSe2) has caused considerable concerns in the field of energy storage because the compound and its composites still suffer from low specific capacity and inferior cyclic stability. In this study, ReSe2 nanoparticles encapsulated in carbon nanofibers were synthesized successfully with simple electrospinning and heat treatment. It was found that graphene modifications could affect considerably the microstructure and electrochemical properties of ReSe2–carbon nanofibers. Accordingly, the modified compound maintained a capacity of 227 mAh g−1 after 500 cycles at 200 mA g−1 for Na+ storage, 230 mAh g−1 after 200 cycles at 200 mA g−1, 212 mAh g−1 after 150 cycles at 500 mA g−1 for K+ storage, which corresponded to the capacity retention ratios of 89%, 97%, and 86%, respectively. Even in Na+ full cells, its capacity was maintained to 82% after 200 cycles at 1C (117 mA g−1). The superior stability of ReSe2–carbon nanofibers benefitted from the extremely weak van der Waals interactions and large interlayer spacing of ReSe2, in association with the role of graphene-modified carbon nanofibers, in terms of the shortening of electron/ion transport paths and the improvement of structural support. This study may provide a new route for a broadened range of applications of other rhenium-based compounds. The online version of this article (10.1007/s40820-019-0248-2) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
6.2
作者：
Ho, CH;Huang, YS;Tiong, KK
通讯作者：
Tiong, KK
影响因子：
17.1
作者：
Park, Hyunjung;Kwon, Jiseok;Lou, Xiong Wen (David)
通讯作者：
Lou, Xiong Wen (David)
影响因子：
15
作者：
Jian, Zelang;Luo, Wei;Ji, Xiulei
通讯作者：
Ji, Xiulei
Ti3C2 MXene 衍生的钛酸钠/钛酸钾纳米带，用于具有增强容量的高性能钠/钾离子电池
影响因子：
17.1
作者：
Dong, Yanfeng;Wu, Zhong-Shuai;Bao, Xinhe
通讯作者：
Bao, Xinhe
化学气相沉积合成超薄六方 ReSe2 薄片的各向异性拉曼性能及光电应用
影响因子：
29.4
作者：
Hafeez, Muhammad;Gan, Lin;Zhai, Tianyou
通讯作者：
Zhai, Tianyou