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Title: Improved cell design for lithium alloy/metal sulfide battery

The disclosed lithium alloy/iron sulfide cell design provides loop-like positive and negative sheet metal current collectors electrically insulated from one another by separator means, the positive collector being located outwardly of the negative collector. The collectors are initially secured within an open-ended cell housing, which allows for collector pretesting for electrical shorts prior to adding any electrode materials and/or electrolyte to the cell. Separate chambers are defined outwardly of the positive collector and inwardly of the negative collector open respectively in opposite directions toward the open ends of the cell housing; and positive and negative electrode materials can be extruded into these respective chambers via the opposite open housing ends. The chambers and cell housing ends can then be sealed closed. A cross wall structurally reinforces the cell housing and also thereby defines two cavities, and paired positive and negative collectors are disposed in each cavity and electrically connected in parallel. The cell design provides for a high specific energy output and improved operating life in that any charge-discharge cycle swelling of the positive electrode material will be inwardly against only the positive collector to minimize shorts caused by the collectors shifting relative to one another.
Authors:
Publication Date:
OSTI Identifier:
6374735
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; LITHIUM-SULFUR BATTERIES; DESIGN; IRON SULFIDES; CHALCOGENIDES; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; IRON COMPOUNDS; METAL-NONMETAL BATTERIES; SULFIDES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS 250901* -- Energy Storage-- Batteries-- Design & Development