Toyota Jidosha Kabushiki Kaisha

Dow Global Technolgoies LLC

Kyushu University

Motoshi Isono

Shigeto Okada

Jun-ichi Yamaki

Ivan Exnar

Thierry Drezen

Jun-Ichi Yamaki

Tatsuya Hashimoto

Yukihiro Okada

Keiichi Takahashi

Masaki Kato

Masaki Matsui

Naoyuki Wada

Hiroki Awano

Kazuhito Kato

Hisashi Yamamoto

Tetsuya Waseda

Masato Ono

Keiichi Minami

Kazuo Yaso

Hiroshi Tsubouchi

Takashi Takemoto

Katsuaki Odagi

Nam Hee Kwon-Roth

Ivo Teerlinck

An all-solid-state battery includes a case, a battery element, and a restraint component. The case accommodates the battery element. The battery element includes an electrode part and a resin part. The resin part covers at least a part of a side face of the electrode part. The restraint component applies a first pressure to the electrode part. The restraint component applies a second pressure to the resin part. The ratio of the second pressure to the first pressure is from 1.5 to 18.

All-solid-state battery, method of producing battery element, and method of producing all-solid-state battery

Provided is an all-solid-state battery which is configured to suppress an increase in the resistance of the all-solid-state battery and which is configured to suppress the peeling-off of the solid electrolyte layer. Disclosed is an all-solid-state battery comprising: a cathode comprising a cathode layer, an anode comprising an anode layer, and a solid electrolyte layer disposed between the cathode layer and the anode layer, wherein a width of the cathode layer is smaller than a width of the anode layer and a width of the solid electrolyte layer; wherein the solid electrolyte layer comprises a non-facing portion where the solid electrolyte layer does not face the cathode layer and a facing portion where the solid electrolyte layer faces the cathode layer; and wherein a binder content of the non-facing portion is larger than a binder content of the facing portion.

All-solid-state battery

A positive electrode includes first positive electrode active material particles and second positive electrode active material particles. The first positive electrode active material particles include 0.1% by mass or more and 1% by mass or less of lithium carbonate and a first lithium transition metal oxide as a remainder. The first lithium transition metal oxide is represented by LiMMnO(0.05&#x2264;z1&#x2264;0.20). The second positive electrode active material particles include 0.01% by mass or more and 0.05% by mass or less of lithium carbonate and a second lithium transition metal oxide as a remainder. The second lithium transition metal oxide is represented by LiMMnO(0.40&#x2264;z2&#x2264;0.60). An electrolytic solution includes 1% by mass or more and 5% by mass or less of an overcharging additive and a solvent and a lithium salt as a remainder.

Lithium ion secondary battery

A lithium secondary battery includes: a positive electrode that contains a positive electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive electrode active material is amorphous and is expressed by LiA[PM]Owhere, in the formula, A is Mn or Ni; M is a glass former element having an electronegativity lower than P; and x, y, a and z respectively satisfy 1&#x3c;x&#x2266;2.5, 0&#x3c;y&#x2266;3, 0&#x2266;a&#x3c;1 and z=(x+(valence of A)+(valence of P)&#xd7;a&#xd7;y+(valence of M)&#xd7;(1&#x2212;a)&#xd7;y)/2.

Lithium secondary battery

Electrode active material of the invention is mainly an amorphous transition metal complex represented by AMPO(where x and y are values which independently satisfy 0&#x2266;x&#x2266;2 and 0&#x2266;y&#x2266;2, respectively, and z=(x+5y+valence of M)/2 to satisfy stoichiometry; also, A is an alkali metal and M is a metal element selected from transition metals), and has a peak near 220 cmin Raman spectroscopy. Applying the electrode active material of the invention to a nonaqueous electrolyte secondary battery increases the capacity of the nonaqueous electrolyte secondary battery.

Electrode active material and manufacturing method of same

Electrode active material that is used together with an electrolyte solution having an electrolyte decomposition potential Ve is represented by the general expression LixFeMyO2 and is amorphous. In the expression, x and y are values which independently satisfy 1&#x3c;x&#x2266;2.5 and O&#x3c;y&#x2266;3, respectively, and z=(x+(valence of Fe)+(valence of M)&#xd7;y)/2 to satisfy stoichiometry, and M represents one or two or more types of glass former element. The average electronegativity of M is less than (Ve+6.74/5.41.

Amorphous electrode active material and lithium secondary battery

A process for the production of nano-structured olivine lithium manganese phosphate (LiMnPO) electrode material comprising of the following steps: sol gel preparation in a chelating environment; preparation of lithium manganese phosphate/carbon composite by ball-milling; and electrode preparation.

Lithium manganese phosphate positive material for lithium secondary battery

Disclosed is an ion-conductive material which comprises an ionic liquid and can realize a higher level of safety. Also disclosed is an electrochemical device using the ion-conductive material. Further disclosed is a method for manufacturing an electrochemical device. An ion-conductive material comprising an ionic liquid satisfying the following conditions: the ionic liquid comprises two or more types of anion, such that at least one type thereof is an anion having a structure in which one or more electron-withdrawing groups are bonded to a central atom having one more non-covalent electron pairs; and the ionic liquid has a maximum exothermic heat-flow peak height no greater than 2 W/g as measured by DSC (measurement temperature range: ordinary temperature to 500&#xb0; C., rate of temperature rise: 2&#xb0; C./minute). Preferably, the ion-conductive material comprises an ionic liquid having a gross calorific value of no greater than 1000 J/g as measured by the DSC.

Ion-conductive material and use thereof

Electrode active material of the invention is such that a LiPOphase is mixed in with an amorphous iron-phosphate complex having a LiFePOcomposition. Applying the electrode active material of the invention to a secondary battery inhibits an irreversible reaction which reduces the irreversible capacity, thus enabling a high capacity to be maintained even when it is used at a high potential.

The main object of the invention is to obtain LiMnPOhaving an excellent crystalline and a high purity at a lower temperature. The present invention provides a method for manufacturing LiMnPO4 including the steps of: precipitating for obtaining precipitate of manganese hydroxide (Mn(OH)) by adding a precipitant to a Mn source solution in which a Mn source is dissolved; reducing for obtaining a reduced dispersion solution by dispersing the precipitate in a reducing solvent; adding for obtaining an added dispersion solution by adding a Li source solution and a P source solution to the reduced dispersion solution; pH adjusting for adjusting the pH of the added dispersion solution in the range of 3 to 6 to obtain a pH-adjusted dispersion solution; and synthesizing for synthesizing by reacting the pH-controlled dispersion solution by a heating under pressure condition.

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Toyota, Japan

Motoshi Isono