Hydro-Quebec

The University of Texas System

Carus Corporation

Apple Inc.

Akshaya K Padhi

John B Goodenough

Christian Masquelier

Kirakodu S Nanjundaswamy

Michel Bernard Armand

Michel Armand

Kirakoda S Nanjundaswamy

Christopher S Johnson

Hongli Dai

Huiming Wu

John David Carter

Dapeng Wang

Xiaoping Wang

Chi-Kai Lin

G Chithambarathanu Pillai

K S Nanjundaswamy

Martin Bettge

YoungHo Shin

Kirakadu S Nanjundaswamy

Chithambarathanu Pillai

Ana Kircova

Compounds, powders, and cathode active materials that can be used in lithium ion batteries are described herein. Methods of making such compounds, powders, and cathode active materials are described.

Cathode active materials for lithium-ion batteries

The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO)as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Cathode materials for secondary (rechargeable) lithium batteries

The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivineor the rhombohedral NASICON structure and the polyanion (PO)as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine, a modified olivine, or the rhombohedral NASICON structure and the polyanion (PO ) as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

The invention is a process which provides a high purity lithiated manganese oxide (Li,Mn,O,) from chemically made MnO,. The lithiated manganese oxide has an especially effective utility for use as a cathodic material in rechargeable batteries. The process of the invention includes blending a lithium compound with a chemically made manganese dioxide to form a manganese dioxide/lithium compound blend. The lithium compound in the blend is at least about one mole of lithium for every mole of manganese dioxide. The manganese dioxide and lithium compound in the blend undergo an ion exchange reaction to provide an ion replaced product where lithium ions have replaced sodium and potassium ions in the MnO,to form an ion replaced product. Thereafter, the ion replaced product is heated or calcined to provide the lithiated manganese oxide.

Lithiated manganese oxide

The invention is a process which provides a high purity lithiated manganese oxide (Li.sub.1+x Mn.sub.2-y O.sub.4) from chemically made MnO.sub.2. The lithiated manganese oxide has an especially effective utility for use as a cathodic material in rechargeable batteries. The process of the invention includes blending a lithium compound with a chemically made manganese dioxide to form a manganese dioxide/lithium compound blend. The lithium compound in the blend is at least about one mole of lithium for every mole of manganese dioxide. The manganese dioxide and lithium compound in the blend are reacted to provide an ion replaced product where lithium ions have replaced sodium and potassium ions in the MnO.sub.2 to form an ion replaced product. Thereafter, the ion replaced product is heated or calcined to provide the lithiated manganese oxide.

Method for making lithiated manganese oxide

The invention relates to materials for use as electrodes in an alkali-ion secondary (rechargeable) battery, particularly a lithium-ion battery. The invention provides transition-metal compounds having the ordered-olivine or the rhombohedral NASICON structure and the polyanion (PO.sub.4).sup.3- as at least one constituent for use as electrode material for alkali-ion rechargeable batteries.

Growing community of inventors

LaSalle, IL, United States of America

Akshaya K Padhi