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| 001 | 279020 | ||
| 005 | 20240708132654.0 | ||
| 037 | _ | _ | |a FZJ-2015-07190 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |a Tsai, Chih-Long |0 P:(DE-Juel1)156244 |b 0 |e Corresponding author |
| 111 | 2 | _ | |a 66th Annual Meeting of the International Society of Electrochemistry |c Taipei |d 2015-10-05 - 2015-10-09 |w Taiwan |
| 245 | _ | _ | |a All-Solid-State Li Battery Using Garnet Structure Ta-substituted Li7La3Zr2O12 as Solid Electrolyte |
| 260 | _ | _ | |c 2015 |
| 336 | 7 | _ | |a Poster |b poster |m poster |0 PUB:(DE-HGF)24 |s 1450106269_20494 |2 PUB:(DE-HGF) |x After Call |
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| 520 | _ | _ | |a All-solid-state Li battery containing oxide-class solid electrolyte is considered to be out stand from their high safety and higher energy density. Compared to the other class the solid Li ionic conductors, oxide-class Li ion conductors have additional advantages of easier material handling during synthesis, higher chemical stability and wider electrochemical window. The use of LLZ as solid electrolyte for solid-state battery had been reported in several papers. However, the reported solid-state batteries were all constructed with a thin film cathode which was made either by physical vapor or sol-gel deposition[1-2]. The thin film cathodes were usually under or around 1 m in thickness which made the energy density of these batteries not practical. In order to realize the using of oxide-class Li ion conductor as solid electrolyte for a Li battery, Ta-substituted Li7La3Zr2O12 (LLZ:Ta) powder had been synthesized via solid state reaction. LLZ:Ta with an optimized sintering parameter exhibits a high Li ion conductivity of 7.8 x 10-4 S cm-1 at 30 oC with a relative density of ~94%. The material was further implanted as a solid electrolyte by using screen printing to put on thick LiCoO2 (> 50 m) as cathode. A proper sintering process was invested for well bonding the thick cathode layer to the supporting electrolyte. The constructed all-solid-state Li batteries exhibited good charge-discharge utilization of active material of more than 80% which is equal to a capacity density of ~0.9mAh cm-2 at 100 oC. It also exhibited good cycle ability that one hundred of cycles were achieved at temperature of 50 oC. Thus, LLZ:Ta shows as a promising candidate for all-solid-state Li battery. However, the reduction of high internal resistance of the cell is still the major challenge for further improvement of the battery performance, especially if the application of this all solid state Li battery is toward room temperature. During this presentation, results from material chemical stability, cell morphology, electrochemical performance and the challenges of building up Li battery by using LLZ:Ta will be discussed. |
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