Proceedings of Online nanoGe Fall Meeting 20 (OnlineNFM20)
Publication date: 4th October 2020
Following the increasing demand for portable smart devices in everyday life activities, the exploration of new materials for efficient and stable storage devices is a big challenge for the scientific community. Metal halide nanostructures synthesized via solution-processed methods have been proposed very recently as promising anode materials to replace the conventional ones in Li-ion batteries. [1,2] Hybrid organic-inorganic and all-inorganic lead halide perovskites have been tested for such purposes the last two years. All these perovskite-based anodes incorporate perovskite materials synthesized at high temperatures (90-150°C) and reaction durations of the order of tens of hours.
In this work we prove that all-inorganic metal halides synthesized with low-temperature solution-processed protocols without using complex apparatus could present more stable Li-ion intercalation/deintercalation materials. They demonstrate also, the best electrochemical features among the nanoparticulate lead halide perovskite anodes used for Li-air batteries, to date. [3, 4] Comparison between anodes incorporating two different morphologies indicated that the morphology and the structure play an important role to the specific discharge capacity as well as to the stability of them.
In particular, it is shown that during the continuous Li-ion intercalation/deintercalation scanning process in aqueous electrolyte, cubes-based anodes showed the high specific capacity of 549 mAh g-1 and excellent operation stability up to 1500 cycles. The high specific capacity and superior stability revealed, coupled with the fast and easy anode fabrication, provide an efficient, low-cost and safe solution for Li-air batteries, considering the use of non-flammable aqueous electrolytes.
This project has received funding from the Hellenic Foundation for Research and Innovation (HFRI) and the General Secretariat for Research and Technology (GSRT) under grant agreement No 1179.
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