Journal article
Interphase control for high performance lithium metal batteries using ether aided ionic liquid electrolyte
U Pal, D Rakov, B Lu, B Sayahpour, F Chen, B Roy, DR MacFarlane, M Armand, PC Howlett, YS Meng, M Forsyth
Energy and Environmental Science | ROYAL SOC CHEMISTRY | Published : 2022
DOI: 10.1039/d1ee02929k
Abstract
Future rechargeable Li metal batteries (LMBs) require a rational electrolyte design to stabilize the interfaces between the electrolyte and both the lithium metal anode and the high voltage cathode. This remains the greatest challenge in achieving high cycling performance in LMBs. We report an ether-aided ionic liquid electrolyte which offers superior Li metal deposition, high voltage (5 V) stability and non-flammability. High performance cycling of LiNi0.8Mn0.1Co0.1O2 (4.4 V) and LiNi0.6Mn0.2Co0.2O2 (4.3 V) cells is demonstrated with high coulombic efficiency (>99.5%) at room temperature and elevated temperatures, even at high practical areal capacity for the latter of 3.8 mA h cm−2 and wit..
View full abstractGrants
Awarded by Australian Government
Funding Acknowledgements
This work is financially supported by the Australia-India Strategic Research Fund (AISRF, grant agreement no. 48515). Professors Maria Forsyth and Douglas R. MacFarlane thank the ARC for their respective Australian Laureate Fellowship (FL110100013 and FL120100019). The authors acknowledge the Australian Research Council (ARC) for funding via the Australian Centre for Electromaterials Science, grant CE140100012. Dr Fangfang Chen acknowledges the assistance of computational resources provided at the NCI National Facility systems at the Australian National University through the National Computational Merit Allocation Scheme supported by the Australian Government. The authors are thankful to Meisam Hasanpoor for his help with contact angle measurement and Thushan Pathirana for his help in discussing the Li battery energy density calculation. Professor Y. Shirley Meng acknowledges the partial funding support from Zable Endowed Chair Fund for the work performed at UC San Diego. Cryo-FIB/SEM was performed at the San Diego Nanotechnology Infrastructure (SDNI), a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (grant ECCS1542148) (USA). XPS work was performed at the UC Irvine Materials Research Institute (IMRI) using instrumentation funded in part by the National Science Foundation Major Research Instrumentation Program under grant no. CHE1338173 (USA).