Alliant Techsystems Inc.

Other

Hsiu-Ping W Lin

David L Chua

Joseph B Kejha

David Chua

Rebecca A Smith

Kevin Burgess

The present invention pertains to lightweight, hard and leakproof prismatic packaging structures for electrochemical devices and economical method of assembly and hermetic sealing of said structures by plastic layers attached to their metal walls. Metal welding is avoided and superior protection of lithium polymer cells and other cells is thus provided at lesser cost.

Lightweight prismatic packaging structure for electrochemical devices and assembly method of the same

A method for producing stable pre-charged Li.sub.x CoO.sub.2 as the cathode active metal in primary or secondary active metal non-aqueous cells and cells using such material are disclosed.

Synthesis of charged Li.sub.x CoO.sub.2 (0&lt;.times.&lt;1) for primary and

An active metal non-aqueous electrochemical cell includes an anode selected from lithium metal and intercalated lithium compounds, an electrolyte system consisting essentially of an SO.sub.2 solvent containing an amount of electrolyte salt, and a solid liquid or gaseous cathode active material selected from a class of materials which are reduced in preference to SO.sub.2, wherein the amount of cathode material is generally limiting with respect to the desired discharge reaction.

High rate electrochemical cell

A primary or secondary electrochemical cell includes an anode containing lithium when in a charged state, a relatively solid gelled electrolyte system including an amount of polyacrylonitrile (PAN), an amount of solvent and plasticizer that includes .gamma.-butyrolactone (.gamma.-BL) and an amount of lithium electrolyte salt, preferably a combination of LiAsF.sub.6 and LiBF.sub.4, and a cathode having a cathode active material selected from transition metal oxides and lithium transition metal oxide intercalation compounds.

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Princeton, NJ, United States of America

Hsiu-Ping W Lin