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Porous Co9S8 Nanosheet [email protected] Foam Electrode via in Situ Sulfidation at Room Temperature for Superior Supercapacitors
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-12-20 , DOI: 10.1021/acs.jpcc.9b09018
Zhaoqiang Zhu 1 , Jiahao Lin 1 , Nan Li 1 , Ruizhi Zhang 1 , Kefu Zhang 1 , Chunhua Zhao 1 , Guorong Chen 1 , Chongjun Zhao 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-12-20 , DOI: 10.1021/acs.jpcc.9b09018
Zhaoqiang Zhu 1 , Jiahao Lin 1 , Nan Li 1 , Ruizhi Zhang 1 , Kefu Zhang 1 , Chunhua Zhao 1 , Guorong Chen 1 , Chongjun Zhao 1
Affiliation
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In this work, novel porous Co9S8 nanosheet arrays are prepared on Co foam through a simple and scalable chemical liquid-phase processing strategy, which involves the uniform growth of cobalt hydroxide hydrogen phosphate microbelts followed by subsequent in situ sulfidation with sodium sulfide at room temperature. As-prepared porous Co9S8 nanosheet arrays can be directly used as binderless electrodes for a supercapacitor. Even at a high mass loading of 11.54 mg cm–2, it delivers a high capacitance of 14518.9 mF cm–2 (1279.4 F g–1) and an exceptional cycle life with a capacitance retention of 85.7% after 15000 cycles at 200 mA cm–2. Moreover, an assembled asymmetric supercapacitor based on an activated carbon negative electrode delivers an encouraging energy density (42.9 W h kg–1 at 828.5 W kg–1) and an excellent cycle life (86% retention after 10000 cycles). This method can be extended to design and construct other high-performance sulfide electrodes for supercapacitors and other energy storage systems.
中文翻译:
多孔Co 9 S 8纳米片[受电子邮件保护]超级电极在室温下通过原位硫化泡沫电极
在这项工作中,通过一种简单且可扩展的化学液相处理策略,在Co泡沫上制备了新颖的多孔Co 9 S 8纳米片阵列,该策略涉及氢氧化钴磷酸氢盐微带的均匀生长,然后在60℃下用硫化钠进行原位硫化。室内温度。所制备的多孔Co 9 S 8纳米片阵列可以直接用作超级电容器的无粘合剂电极。即使在11.54 mg cm –2的高质量负载下,它也可提供14518.9 mF cm –2(1279.4 F g –1)的高电容,并具有出色的循环寿命,在200 mA cm下进行15000次循环后,电容保持率为85.7%。–2。此外,基于活性碳负电极组装不对称超级电容器提供一个鼓励的能量密度(42.9 W时千克-1在828.5千克w ^ -1)和优异的循环寿命(86%保留10000次循环后)。该方法可以扩展到设计和构造用于超级电容器和其他能量存储系统的其他高性能硫化物电极。
更新日期:2019-12-20
中文翻译:

多孔Co 9 S 8纳米片[受电子邮件保护]超级电极在室温下通过原位硫化泡沫电极
在这项工作中,通过一种简单且可扩展的化学液相处理策略,在Co泡沫上制备了新颖的多孔Co 9 S 8纳米片阵列,该策略涉及氢氧化钴磷酸氢盐微带的均匀生长,然后在60℃下用硫化钠进行原位硫化。室内温度。所制备的多孔Co 9 S 8纳米片阵列可以直接用作超级电容器的无粘合剂电极。即使在11.54 mg cm –2的高质量负载下,它也可提供14518.9 mF cm –2(1279.4 F g –1)的高电容,并具有出色的循环寿命,在200 mA cm下进行15000次循环后,电容保持率为85.7%。–2。此外,基于活性碳负电极组装不对称超级电容器提供一个鼓励的能量密度(42.9 W时千克-1在828.5千克w ^ -1)和优异的循环寿命(86%保留10000次循环后)。该方法可以扩展到设计和构造用于超级电容器和其他能量存储系统的其他高性能硫化物电极。