Hierarchical nanoflowers assembled from MoS2/polyaniline sandwiched nanosheets for high-performance supercapacitors
Hierarchical nanoflowers assembled from MoS2/polyaniline sandwiched nanosheets for high-performance supercapacitors
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由 MoS2/聚苯胺夹层纳米片组装而成的分层纳米花，用于高性能超级电容器
DOI：
10.1016/j.electacta.2017.04.161
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发表时间：
2017-07-20
影响因子：
6.6
通讯作者：
Schmidt, Oliver G.
中科院分区：
文献类型：
--
作者：
Chao, Jie;Deng, Junwen;Schmidt, Oliver G.
为了实现超级电容器的高容量和长循环性能，人们开发了由MoS_2/聚苯胺夹心纳米片(MoS_2/PANI SNSS)组装的分级微花作为电极材料。在杂化纳米片中，PANI嵌入到MoS_2的(002)层间，导致电子传递增强和层间扩张，这有利于离子扩散动力学。此外，层次化的微花状结构防止了MoS2纳米片的聚集，而三明治结构缓解了PANI在重复充放电循环中的体积膨胀和溶解。在超级电容器三电极测试系统中，MoS_2/PANI SNSS在第一次循环10Ag(-1)时显示245.5 Fg(-1)，并在16000次循环后保持212.6 Fg(-1)。组装成对称的双电极结构的MoS2/PANI SNSS在第一次循环中1Ag(-1)时显示81.3Fg(-1)，8000次循环后保持70.0Fg(-1)。(C)2017爱思唯尔有限公司。保留所有权利。
To realize high capacitance and long cycle performance of supercapacitors, hierarchical microflowers assembled from MoS2/polyaniline sandwiched nanosheets (MoS2/PANI SNSs) have been developed as electrode materials. In the hybrid nanosheets, PANI intercalates into the (002) interlayer of MoS2, leading to enhanced electron transfer as well as expanded interlayers which is beneficial for ion diffusion kinetics. Furthermore, the hierarchical microflower-like structure prevents aggregation of MoS2 nanosheets, while the sandwich structure relieves the volume expansion and dissolution of PANI during repeated charge/discharge cycles. In the three-electrode test system for supercapacitors, the MoS2/PANI SNSs Exhibit 245.5 F g(-1) at a 10A g(-1) in the first cycle, and retain 212.6 F g(-1) after 16000 cycles. Assembled as symmetric supercapacitors in the two-electrode configuration, the MoS2/PANI SNSs show 81.3 F g(-1) at 1 A g(-1) in the first cycle, and retain 70.0 F g(-1) after 8000 cycles. (C) 2017 Elsevier Ltd. All rights reserved.