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All-solid secondary battery electrode sheet, all-solid secondary battery, and methods for manufacturing all-solid secondary battery electrode sheet and all-solid secondary battery
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A technology for secondary batteries and manufacturing methods, which is applied to secondary batteries, battery electrodes, non-aqueous electrolyte storage battery electrodes, etc., can solve the problems of easy peeling of conductor layers and electrode active material layers, and achieve excellent discharge capacity effects
Active Publication Date: 2020-08-21
FUJIFILM CORP
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[0006] In addition, in Patent Document 2, it is described that when an electrode laminate having a conductor layer is used for a battery after stamping, peeling tends to occur between the conductor layer and the electrode active material layer.
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[0291] (Preparation of Composition for Conductor Layer Formation)
[0292] About the composition for conductor layer formation, it prepares by stirring electroconductive particle (C) in a dispersion medium, and making it slurry.
[0293] Slurry can be performed by mixing electroconductive particle (C) and a dispersion medium using various mixers. It does not specifically limit as a mixing apparatus, For example, a ball mill, a bead mill, a planetary mixer, a scraper mixer, a roll mill, a kneader, and a disc mill are mentioned. The mixing conditions are not particularly limited. For example, when using a ball mill, mixing is preferably performed at 150 to 700 rpm (rotation per minute: revolutions per minute) for 5 minutes to 24 hours. After mixing, filtration can be performed if desired.
[0294] In the case of preparing a composition for forming a conductor layer containing components such as a binder (D) in addition to the conductive particles (C), it may be added and mixed...
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[0343] The present invention will be described in further detail based on examples, but the present invention will not be limitedly interpreted in this way.
[0344] [Synthesis of sulfide-based inorganic solid electrolyte Li-P-S-based glass]
[0345] As a sulfide-based inorganic solid electrolyte, refer to T.Ohtomo, A.Hayashi, M.Tatsumisago, Y.Tsuchida, S.Hama, K.Kawamoto, Journal of Power Sources, 233, (2013), pp231-235 and A. Hayashi, S. Hama, H. Morimoto, M. Tatsumisago, T. Minami, Chem. Lett., (2001), pp872-873 (both non-patent literature), synthesized Li-P-S type glasses.
[0346] Specifically, 2.42 g of lithium sulfide (Li2S, manufactured by Aldrich.Inc, purity>99.98%) and phosphorus pentasulfide (P2S5, manufactured by Aldrich.Inc, purity >99%) 3.90 g, was put into an agate mortar, and mixed for 5 minutes using an agate pestle. Li 2 S and P 2 S 5 The mixing ratio of Li is set in molar ratio 2 S:P 2 S 5 =75:25.
[0347]Into a 45 mL container made of zirconia (man...
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Abstract
Provided is an all-solid secondary battery electrode sheet having, on at least one surface of a current collector, a conductive particle (C)-containing conductive layer and an electrode active material layer in this order. The all-solid secondary battery electrode sheet has the electrode active material layer on the surface of the conductive layer which has a maximum height roughness Rz of 3.0-10[mu]m according to JIS B 0601:2013, said electrode active material layer containing an active material (A) having a median diameter Ram and an inorganic solidelectrolyte (B) having a median diameterRse, wherein Ram, Rse, and Rz satisfy formulae (1) and (2). Also provided are an all-solid secondary battery provided with the all-solid secondary battery electrode sheet, and methods for manufacturing the all-solid secondary battery electrode sheet and the all-solid secondary battery. Formula (1): 0.15<Rz / Ram<90 Formula (2): 0.15<Rz / Rse<90
Description
technical field [0001] The invention relates to an electrode sheet for an all-solid secondary battery, an all-solid secondary battery, an electrode sheet for the all-solid secondary battery, and a manufacturing method for the all-solid secondary battery. Background technique [0002] A lithium-ion secondary battery is a storage battery that has a negative electrode, a positive electrode, and an electrolyte sandwiched between the negative electrode and the positive electrode, and can reciprocate lithium ions between the two electrodes for charging and discharging. Conventionally, in lithiumion secondary batteries, an organic electrolytic solution is used as an electrolyte. However, organic electrolytes are prone to liquid leakage, and there is a possibility of a short circuit inside the battery and being ignited due to overcharging or overdischarging, so further improvements in safety and reliability are required. [0003] Under such circumstances, all-solid-state secondary...
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