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1. (WO2012054766) COMPOSITE STRUCTURES CONTAINING HIGH CAPACITY POROUS ACTIVE MATERIALS CONSTRAINED IN SHELLS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/054766    International Application No.:    PCT/US2011/057158
Publication Date: 26.04.2012 International Filing Date: 20.10.2011
IPC:
H01M 4/13 (2010.01), H01M 10/0525 (2010.01), H01M 4/139 (2010.01), H01M 4/38 (2006.01), H01M 4/48 (2010.01), H01M 4/58 (2010.01)
Applicants: AMPRIUS INC. [US/US]; 1430 O'Brien Drive, Suite C Menlo Park, California 94025 (US) (For All Designated States Except US).
FASCHING, Rainer, J. [AT/US]; (US) (For US Only).
LIU, Zuqin [CN/US]; (US) (For US Only).
HAN, Song [CN/US]; (US) (For US Only).
LOVENESS, Ghyrn, E. [US/US]; (US) (For US Only).
STEFAN, Constantin, I. [RO/US]; (US) (For US Only)
Inventors: FASCHING, Rainer, J.; (US).
LIU, Zuqin; (US).
HAN, Song; (US).
LOVENESS, Ghyrn, E.; (US).
STEFAN, Constantin, I.; (US)
Agent: GUSEV, Vladimir, Y.; WEAVER AUSTIN VILLENEUVE & SAMPSON LLP P.O. Box 70250 Oakland, California 94612-0250 (US)
Priority Data:
61/406,049 22.10.2010 US
Title (EN) COMPOSITE STRUCTURES CONTAINING HIGH CAPACITY POROUS ACTIVE MATERIALS CONSTRAINED IN SHELLS
(FR) STRUCTURES COMPOSITES CONTENANT DES MATÉRIAUX ACTIFS POREUX HAUTE CAPACITÉ CONTRAINTS DANS DES ENVELOPPES
Abstract: front page image
(EN)Provided are novel electrode material composite structures containing high capacity active materials formed into porous base structures. The structures also include shells that encapsulate these porous base structures. During lithiation of the active material, the shell mechanically constrains the porous base structure. The shell allows lithium ions to pass through but prevents electrolyte solvents from interacting with the encapsulated active material. In certain embodiments, the shell contains carbon, while the porous base structure contains silicon. Although silicon tends to swell during lithiation, the porosity of the base structure and/or void spaces inside the shell helps to accommodate this additional volume within the shell without breaking it or substantially increasing the overall size of the composite structure. This allows integration of the composite structures into various types of battery electrodes and cycling high capacity active materials without damaging the electrodes' internal structures and deteriorating cycling characteristics of batteries.
(FR)L'invention porte sur de nouvelles structures composites de matériau d'électrode qui contiennent des matériaux actifs haute capacité, formés dans des structures de base poreuses. Les structures comprennent également des enveloppes qui encapsulent ces structures de base poreuses. Pendant la lithiation du matériau actif, l'enveloppe contraint de manière mécanique la structure de base poreuse. L'enveloppe permet aux ions lithium de passer à travers celle-ci mais empêche des solvants d'électrolyte d'interagir avec le matériau actif encapsulé. Dans certains modes de réalisation, l'enveloppe contient du carbone, alors que la structure de base poreuse contient du silicium. Bien que le silicium ait tendance à gonfler pendant la lithiation, la porosité de la structure de base et/ou des espaces vides à l'intérieur de l'enveloppe aident à recevoir ce volume supplémentaire à l'intérieur de l'enveloppe sans la rompre, ni sensiblement augmenter la taille globale de la structure composite. Ceci permet une intégration des structures composites dans divers types d'électrodes de batterie et un cycle de matériaux actifs de haute capacité sans endommager les structures internes d'électrodes et sans détériorer les caractéristiques de cycle des batteries.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)