![]() We also demonstrate rapid Li + conduction in lanthanide metal chlorides (LnCl 3 Ln = La, Ce, Nd, Sm and Gd), suggesting that the LnCl 3 solid electrolyte system could provide further developments in conductivity and utility.įamprikis, T., Canepa, P., Dawson, J. When directly coupled with an uncoated LiNi 0.5Co 0.2Mn 0.3O 2 cathode and bare Li metal anode, the Li 0.388Ta 0.238La 0.475Cl 3 electrolyte enables a solid battery to run for more than 100 cycles with a cutoff voltage of 4.35 V and areal capacity of more than 1 mAh cm −2. It also generates a gradient interfacial passivation layer to stabilize the Li metal electrode for long-term cycling of a Li–Li symmetric cell (1 mAh cm −2) for more than 5,000 h. The optimized Li 0.388Ta 0.238La 0.475Cl 3 electrolyte exhibits Li + conductivity of 3.02 mS cm −1 at 30 ☌ and a low activation energy of 0.197 eV. ![]() In contrast to a Li 3MCl 6 (M = Y, In, Sc and Ho) electrolyte lattice 3, 4, 5, 6, the UCl 3-type LaCl 3 lattice has large, one-dimensional channels for rapid Li + conduction, interconnected by La vacancies via Ta doping and resulting in a three-dimensional Li + migration network. ![]() Here we report a LaCl 3-based lithium superionic conductor possessing excellent interfacial compatibility with lithium metal electrodes. ![]() Inorganic superionic conductors possess high ionic conductivity and excellent thermal stability but their poor interfacial compatibility with lithium metal electrodes precludes application in all-solid-state lithium metal batteries 1, 2. ![]()
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