Title: Secondary cell with orthorhombic alkali metal/manganese oxide phase active cathode material

Abstract

An alkali metal manganese oxide secondary cell is disclosed which can provide a high rate of discharge, good cycling capabilities, good stability of the cathode material, high specific energy (energy per unit of weight) and high energy density (energy per unit volume). The active material in the anode is an alkali metal and the active material in the cathode comprises an orthorhombic alkali metal manganese oxide which undergoes intercalation and deintercalation without a change in phase, resulting in a substantially linear change in voltage with change in the state of charge of the cell. The active material in the cathode is an orthorhombic structure having the formula M.sub.x Z.sub.y Mn.sub.(1-y) O.sub.2, where M is an alkali metal; Z is a metal capable of substituting for manganese in the orthorhombic structure such as iron, cobalt or titanium; x ranges from about 0.2 in the fully charged state to about 0.75 in the fully discharged state, and y ranges from 0 to 60 atomic %. Preferably, the cell is constructed with a solid electrolyte, but a liquid or gelatinous electrolyte may also be used in the cell.

Inventors:

Doeff, Marca M ^[1]; Peng, Marcus Y ^[2]; Ma, Yanping ^[3]; Visco, Steven J ^[4]; DeJonghe, Lutgard C ^[5]

---

+ Show Inventor Affiliations

1. Hayward, CA
2. Cupertino, CA
3. Albany, CA
4. Berkeley, CA
5. Lafayette, CA

Issue Date:

1996-01-01

Research Org.:

Univ. of California (United States)

OSTI Identifier:

870611

Patent Number(s):

5558961

Assignee:

Regents, University of California (Oakland, CA)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

Show more

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C01G45/1221 - {Manganates or manganites with a manganese oxidation state of Mn
C01G45/1228 - {of the type [MnO2]n- , e.g. LiMnO2, Li[MxMn1-x]O2}
C01G49/0072 - {containing manganese}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/77 - by unit-cell parameters, atom positions or structure diagrams
C01P2002/90 - Other crystal-structural characteristics not specified above
C01P2006/40 - Electric properties

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
H01M10/0565 - Polymeric materials, e.g. gel-type or solid-type
H01M2004/028 - {Positive electrodes}
H01M4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M4/485 - of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M4/505 - of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/10 - Energy storage

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P70/50 - Manufacturing or production processes characterised by the final manufactured product

Show less

DOE Contract Number:  

AC03-76SF00098

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

secondary; cell; orthorhombic; alkali; metal; manganese; oxide; phase; active; cathode; material; disclosed; provide; rate; discharge; cycling; capabilities; stability; specific; energy; unit; weight; density; volume; anode; comprises; undergoes; intercalation; deintercalation; change; resulting; substantially; linear; voltage; charge; structure; formula; z; mn; 1-y; capable; substituting; iron; cobalt; titanium; ranges; charged; 75; discharged; 60; atomic; preferably; constructed; solid; electrolyte; liquid; gelatinous; substantially linear; energy density; active material; alkali metal; solid electrolyte; cathode material; manganese oxide; unit volume; secondary cell; metal capable; cathode comprises; active cathode; specific energy; oxide phase; metal cap; oxide secondary; cycling capabilities; /429/