Journal
JOURNAL OF POWER SOURCES
Volume 485, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.229325
Keywords
All-solid-state lithium batteries; Oxygen-containing atmosphere; Sulfide electrolyte film; Specific energy/power
Funding
- National Key Research and Development Program of China [2018YFB0104300]
- National Natural Science Foundation of China [51827807, 51636002]
- Science and Technology Major Project of China National Machinery Industry Corporation [SINOMAST-ZDZX-2019-04]
- Special Funds for Innovation Driven Development of Guangxi Zhuang Autonomous Region [AA17204061]
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In recent decades, the development of all-solid-state lithium batteries has been hindered by the brittle nature of sulfide-based solid electrolytes and poor interface compatibility. By utilizing a thin sulfide electrolyte film, the cell-level energy and power of the batteries can be significantly increased, improving cycle stability and power performance.
In recent decades, all-solid-state lithium batteries have gained enormous attention due to the improved safety performance and high specific energy. However, the brittle nature of sulfide-based solid electrolytes and poor interface compatibility limit the long-cycle stability and high rate performance of ASSLBs. The utilization of a thick solid electrolyte further reduces the cell-level energy and power. Herein, we prepare a thin sulfide electrolyte film (65 mu m) using modified Li6PS5Cl and poly (ethylene oxide) (PEO). Under a high loading of 4.46 mA h cm-2, the assembled cell employing this electrolyte film with LiNi0.7Co0.2Mn0.1O2 cathode and lithium-indium alloy anode maintains a 1000 stable cycles with 74% capacity retention and average 99.85% coulombic efficiency at 60 degrees C. The cell-level energy and power are increased by an order of magnitude compared with traditionally prepared solid-state batteries. An excellent specific power of 374.7 W kg(-1) is delivered at the initial cycle. This modified electrolyte film is expected to be commercially produced in the near future.
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