Recently, the research group of two-dimensional materials and energy components of the Dalian Institute of Chemical Physics, CAS, Wuzhong team worked with CAS academician Baoshin and the team to develop a planar integrated solid-state lithium ion micro battery with multiple directional mass transfer, excellent flexibility and high temperature stability.
The results of the study are published in the Nano energy. With the rapid development of flexible wearable, miniaturization and integrated electronic devices, it is urgent to develop high performance, lightweight, wearable and structural functional integrated flexible power supply and its technology.
Lithium-ion battery is currently the most widely used in society, the most popular one of the power supply, but there is a large size, fixed shape, flexible, electrolyte leakage and combustible and other security issues, it is difficult to meet the needs of flexible, miniaturized electronic devices. Recently, the research team pioneered the development of a fully solid-state planar integrated lithium-ion micro-cell. The lithium-ion micro-battery with nano-titanium titanate nano-ball as the negative, lithium iron phosphate micron ball as the cathode, high conductive graphene for non-metallic set fluid, ion gel for electrolyte, with planar ten-finger cross configuration without the use of traditional diaphragm and metal set fluid. 3The lithium ion batteries obtained have the advantages of multiple directional mass transfer, which show high volume energy density 125.5mwh/cm , excellent magnification performance; Super long cycle stability, the capacity of 3,300 cycles after the basic no attenuation; And good mechanical flexibility, there is no damage to the electrode structure and no obvious change of electrochemical properties under repeated bending or distortion. At the same time, the miniature energy storage device can work stably in 100 ℃ high temperature environment and has long cycle stability (1000 cycles). In addition, the lithium-ion battery can realize modular self integration without metal connector, and realize effective regulation of output voltage and capacity.
Therefore, the lithium-ion micro-cell has great potential in the application of flexible and miniaturized electronic devices.
