Kabushiki Kaisha Toyota Chuo Kenkyusho

Tooru Saeki

Shingo Ohta

Takahiko Asaoka

Shogo Komagata

Yuki Goto

A secondary batteryincludes a first electrode, a first current collection part, a second electrode, and a separation membrane. The first electrodeis a columnar body including a first active material. The first current collection partis connected to the first electrode. The second electrodeincludes a second active material. The separation membranehas ionic conductivity and insulates the first electrodefrom the second electrode. The secondary batteryhas a structure in which a plurality of the first electrodesare bundled together, with each of the first electrodesbeing adjacent to the second electrodewith the separation membranedisposed therebetween. The plurality of the first electrodesis connected to the first current collection partvia a connection partformed of a low-melting-point metal.

Secondary battery and method for manufacturing same

An all-solid lithium secondary batteryincludes a solid electrolyte layercomposed of a garnet-type oxide, a positive electrodeformed on one surface of the solid electrolyte layerand a negative electrodeformed on the other surface of the solid electrolyte layer. This all-solid lithium secondary batteryincludes an integrally sintered complex of the solid electrolyte layerand the positive electrode active material layer. This complex is obtained by integrally sintering a stacked structure of an active material layer and a solid electrolyte layer. The solid electrolyte layer includes: abase material mainly including a fundamental composition of Li(La,A) (Zr,T)O, wherein A is one or more of Sr and Ca, T is one or more of Nb and Ta, and 0&#x2266;X&#x2266;1.0 and 0&#x2266;Y&#x3c;0.75 are satisfied, as a main component; and an additive component including lithium borate and aluminum oxide.

Garnet-type ion conducting oxide, complex, lithium secondary battery, manufacturing method of garnet-type ion conducting oxide and manufacturing method of complex

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Nagakute, Japan

Tooru Saeki