Hybrid Aqueous/Nonaqueous Water-in-Bisalt Electrolyte Enables Safe Dual Ion Batteries
| Autor: | Yujun Fu, Qingnuan Zhang, Yue Wang, Lingyang Liu, Jiaojiao Zhu, Xingbin Yan, Yongtai Xu, Yali Li, Dewei Xiao, Junshuai Li |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Anode Biomaterials chemistry.chemical_compound chemistry Chemical engineering law General Materials Science Niobium pentoxide 0210 nano-technology Faraday efficiency Biotechnology Voltage |
| Zdroj: | Small (Weinheim an der Bergstrasse, Germany). 16(17) |
| ISSN: | 1613-6829 |
| Popis: | Dual ion batteries (DIBs) have recently attracted ever-increasing attention owing to the potential advantages of low material cost and good environmental friendliness. However, the potential safety hazards, cost, and environmental concerns mainly resulted from the commonly used nonaqueous organic solvents severely hinder the practical application of DIBs. Herein, a hybrid aqueous/nonaqueous water-in-bisalt electrolyte with both broad electrochemical stability window and excellent safety performance is developed. The lithium-based DIB assembled using KS6 graphite and niobium pentoxide as the active materials in the cathode and anode exhibits good comprehensive performance including capacity, cycling stability, rate performance, and medium discharge voltage. Initial capacities of ≈47.6 and 29.6 mAh g-1 retention after 300 cycles can be delivered with a medium discharge voltage of around 2.2 V in the voltage window of 0-3.2 V at the current density of 200 mA g-1 . Good rate performance for the battery can be indicated by 29.7 mAh g-1 discharge capacity retention at 400 mA g-1 . It is noteworthy that the coulombic efficiency of the battery can reach as high as 93.9%, which is comparable to that of the corresponding DIBs using nonaqueous organic electrolytes. |
| Databáze: | OpenAIRE |
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