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Lithium-ion micro energy storage device—flexible, high temperature resistance, modularization integration

2018-07-18 来源:转载自第三方
18 July 2018
  Recently, the team of Wu Zhongshuai of Dalian Institute of Chemical Industry and the team of Bao Xinhe academicians have developed a planar integrated all-solid-state lithium-ion microbattery with multi-directional mass transfer, excellent flexibility and high temperature stability. The related article is entitled “All-Solid-State Planar Integrated Lithium Ion Micro-Batteries with Extraordinary Flexibility and High-Temperature Performance" [1], published on Nano Energy.
  In recent years, with the rapid development of flexible wearable, portable, miniaturized, and integrated electronic devices, it is urgent to develop micro energy storage devices with high power density, high energy density, flexibility, and modular integration. Lithium-ion energy storage devices are currently the most widely used and most popular in the society. However, the device configuration of the stacked structure greatly limits its mechanical flexibility, high temperature performance and modular integration capability.
  In the middle of last month, the research team developed a new concept of all-solid flexible planar lithium-ion microcapacitors [2]. The microcapacitor uses a high-conductivity graphene as a current collector, a high-voltage ion gel as an electrolyte, a nano-titanium titanate as negative electrode and an activated graphene as positive electrode to construct a high-ion electron-conducting planar interdigitated microelectrode, and further assembled an all-solid lithium-ion microcapacitor on the substrate. The lithium ion microcapacitor has high energy density, excellent cycle stability, high temperature electrochemical stability, excellent mechanical flexibility, and good modular integration capability.
  Recently, the research team developed an all-solid-state planar integrated lithium-ion micro battery (LIMB) with excellent volumetric energy density, excellent flexibility, and high temperature performance. The planar LIMBs were manufactured based on the interdigital patterns of lithium titanate nanospheres/graphene as anode and lithium iron phosphate microspheres/graphene as cathode, free of polymer binder and separator, working in ionogel electrolyte. The resulting LIMB exhibits high volumetric energy density, excellent rate performance, excellent cycle stability, excellent flexibility, high temperature stability, excellent miniaturization and simplified modularity at room temperature for easy control of the output voltage and capacity.
  The work of Wu Zhongshuai's team provides new strategies and tremendous opportunities for the development of flexible, miniaturized, and intelligent energy storage devices. We look forward to its early entry into our lives.
[1] Shuanghao Zheng, Zhong-Shuai Wu, Feng Zhou, et al. All-solid-state planar integrated lithium ion micro-batteries with extraordinary flexibility and high-temperature performance. Nano Energy 2018, 51, 613-620.
[2] Shuanghao Zheng, Jiaming Ma, Zhong-Shuai Wu, et al. All-solid-state flexible planar lithium ion micro-capacitors. Energy Environ. Sci., 2018, doi: 10.1039/C8EE00855H.
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