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000909155 0247_ $$2ISSN$$a2050-7496
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000909155 1001_ $$0P:(DE-Juel1)156244$$aTsai, Chih−Long$$b0$$eCorresponding author
000909155 245__ $$aInstability of Ga-substituted Li 7 La 3 Zr 2 O 12 toward metallic Li
000909155 260__ $$aLondon [u.a.]$$bRSC$$c2022
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000909155 520__ $$aGa-substituted Li7La3Zr2O12 (LLZO) garnet is among the most promising solid electrolytes for next-generation all-solid-state Li battery (SSLB) applications due to its very high Li-ion conductivity. However, the attempts to use Ga-substituted LLZO as a solid electrolyte for SSLBs are not yet successful. Here, the research results show that Li6.4Ga0.2La3Zr2O12 can be reduced by Li at 25 C when the surface of the material is properly cleaned. The experimental results suggest that Ga leached out of the garnet structure to form the Li–Ga alloy, which apparently would short-circuit the battery if Ga-substituted LLZO is used as a solid electrolyte. When low concentration Ga-substitution is applied, e.g. Li6.45Ga0.05La3Zr1.6Ta0.4O12, the material seems stable against Li at ambient temperature but not at high temperatures, where heat treatment is usually used to reduce the interfacial resistance between Li and LLZO. The experimental results are also supported by density functional theory calculations to show that the Ga-substituted LLZO/Li interface tends to transform into LLZO and the Li2Ga intermetallic compound. The results highlight the importance of substitution selection for LLZO, for which the Ga-substituted LLZO solid electrolyte may not be suitable for direct contact with metallic Li
000909155 536__ $$0G:(DE-HGF)POF4-1223$$a1223 - Batteries in Application (POF4-122)$$cPOF4-122$$fPOF IV$$x0
000909155 536__ $$0G:(BMBF)13XP0224B$$aLiSi - Lithium-Solid-Electrolyte Interfaces (13XP0224B)$$c13XP0224B$$x1
000909155 536__ $$0G:(BMBF)13XP0223A$$aCatSe - Interfaces and Interphases in Rechargeable Li Based Batteries: Cathode/Solid Electrolyte (13XP0223A)$$c13XP0223A$$x2
000909155 536__ $$0G:(EU-Grant)635643$$aHIPSTER - Deployment of high pressure and temperature food processing for sustainable, safe and nutritious foods with fresh-like quality (635643)$$c635643$$fH2020-SFS-2014-2$$x3
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000909155 7001_ $$00000-0001-6419-3655$$aThuy Tran, Ngoc Thanh$$b1
000909155 7001_ $$0P:(DE-Juel1)161348$$aSchierholz, Roland$$b2
000909155 7001_ $$0P:(DE-Juel1)172733$$aLiu, Zigeng$$b3
000909155 7001_ $$0P:(DE-Juel1)188297$$aWindmüller, Anna$$b4
000909155 7001_ $$0P:(DE-Juel1)194134$$aLin, Che-an$$b5$$ufzj
000909155 7001_ $$0P:(DE-Juel1)177996$$aXu, Qi$$b6
000909155 7001_ $$0P:(DE-Juel1)180280$$aLu, Xin$$b7
000909155 7001_ $$0P:(DE-Juel1)161141$$aYu, Shicheng$$b8
000909155 7001_ $$0P:(DE-Juel1)161208$$aTempel, Hermann$$b9
000909155 7001_ $$0P:(DE-Juel1)157700$$aKungl, Hans$$b10
000909155 7001_ $$0P:(DE-Juel1)191555$$aLin, Shih-kang$$b11$$ufzj
000909155 7001_ $$0P:(DE-Juel1)156123$$aEichel, Rüdiger-A.$$b12
000909155 773__ $$0PERI:(DE-600)2702232-8$$a10.1039/D1TA10215J$$gVol. 10, no. 20, p. 10998 - 11009$$n20$$p10998 - 11009$$tJournal of materials chemistry / A$$v10$$x2050-7488$$y2022
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