Electric discharge direct writing of 3D Mo-MoOx pseudocapacitive micro-supercapacitors with designable patterns
Electric discharge direct writing of 3D Mo-MoOx pseudocapacitive micro-supercapacitors with designable patterns
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DOI：
10.1016/j.ceramint.2023.04.096
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发表时间：
2023-04
影响因子：
5.2
通讯作者：
Yunying Xu;Peiquan Deng;Ri Chen;Weijun Xie;Zehan Xu;Yong Yang;Dawei Liu;Fu Huang;Zhixin Zhuang;I. Zhitomirsky;Kaiyuan Shi
中科院分区：
文献类型：
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作者：
Yunying Xu;Peiquan Deng;Ri Chen;Weijun Xie;Zehan Xu;Yong Yang;Dawei Liu;Fu Huang;Zhixin Zhuang;I. Zhitomirsky;Kaiyuan Shi
现有的制备技术需要昂贵的设备、苛刻的制备环境、昂贵的材料和复杂的制备工艺，极大地阻碍了具有图案化设计的3D陶瓷赝电容微超级电容器（pMSC）的发展。本文首次采用一步放电直写（EDDW）技术制备了由Mo-MoOx集成电极和可设计图案组成的三维pMSCs。所开发的3D pMSC表现出49.1 mF cm-2的高电容（扫描速率：5 mV s-1），并且在5000次循环后实现了96%的良好电容保持率。此外，不添加任何导电添加剂的3D pMSC可以在高达20 V s-1的极高扫描速率下工作，并保持6.3 mF cm-2的高面电容。EDDW的这种简单、安全、低成本、无粘合剂、无导电添加剂和环境友好的制造技术为有效制造具有可设计的3D图案和改进的电化学性能的不同种类的能量存储设备开辟了新的策略。
The development of 3D ceramic pseudocapacitive micro-supercapacitors (pMSCs) with patterned design was greatly hindered by the existing fabrication techniques that requires expensive equipment, harsh manufacturing environments, expensive materials and complicated fabrication processes. Herein, for the first time, one step electric discharge direct writing (EDDW) technique has been developed to fabricate 3D pMSCs, which are composed of Mo-MoOxintegrated electrodes with designable patterns. The developed 3D pMSCs exhibited a high capacitance of 49.1 mF cm−2(Scanning Rate: 5 mV s−1) and achieved a good capacitance retention of 96% after 5000 cycles. Additionally, the 3D pMSCs without adding any conductive additives could be operated up to an extremely high scanning rate of 20 V s−1and retained a high areal capacitance of 6.3 mF cm−2. This simple, safe, low-cost, binder-free, conductive additive free and environmentally friendly fabrication technique of EDDW opens a new strategy for efficient fabricating different kinds of energy storage devices with designable 3D patterns and improved electrochemical performance.