Interphase control for high performance lithium metal batteries using ether aided ionic liquid electrolyte

Pal Urbi; Rakov Dmitrii; Lu BingyuSayahpour BaharakChen FangfangRoy BinayakMacFarlane Douglas R.Armand MichelHowlett Patrick C.Meng Ying ShirleyForsyth Maria

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Interphase control for high performance lithium metal batteries using ether aided ionic liquid electrolyte

机译：Interphase control for high performance lithium metal batteries using ether aided ionic liquid electrolyte

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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 with a capacity retention of 91% after 100 cycles. The ether-ionic liquid chemistry enables desirable plated Li microstructures with high packing density, minimal 'dead' or inactive lithium formation and dendrite-free long-term cycling. Along with XPS studies of cycled electrode surfaces, we use molecular dynamics simulations to demonstrate that changes to the electrolyte interfacial chemistry upon addition of DME plays a decisive role in the formation of a compact stable SEI.

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《Energy & environmental science: EES》 |2022年第5期|1907-1919|共13页
作者
Pal Urbi; Rakov Dmitrii; Lu BingyuSayahpour BaharakChen FangfangRoy BinayakMacFarlane Douglas R.Armand MichelHowlett Patrick C.Meng Ying ShirleyForsyth Maria;
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Deakin Univ, Inst Frontier Mat IFM, Burwood, Vic 3125, Australia;

Deakin Univ, Inst Frontier Mat IFM, Burwood, Vic 3125, Australia|Deakin Univ, ARC Ctr Excellence Electromat Sci ACES, Burwood, Vic 3125, Australia;

Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USAMonash Univ, Sch Chem, Clayton, Vic 3800, AustraliaDeakin Univ, ARC Ctr Excellence Electromat Sci ACES, Burwood, Vic 3125, Australia|Monash Univ, Sch Chem, Clayton, Vic 3800, AustraliaDeakin Univ, Inst Frontier Mat IFM, Burwood, Vic 3125, Australia|Basque Res & Technol Alliance BRTA, CIC EnergiGUNE, Alava Technol Pk,Albert Einstein 48, Vitoria 01510, SpainUniv Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA|Univ Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093 USA;

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Interphase control for high performance lithium metal batteries using ether aided ionic liquid electrolyte

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