公开(公告)号：US10224577B2

公开(公告)日：2019-03-05

申请号：US14040241

申请日：2013-09-27

Applicant: Field Upgrading USA, Inc.

Inventor： Sai Bhavaraju ,  Mathew Robins ,  Chett Boxley

IPC: H01M10/00 ,  H01M10/42 ,  H01B1/12 ,  H01M4/38 ,  H01M10/054 ,  H01M10/0562 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/39

Abstract: The present invention provides a secondary cell having a negative electrode compartment and a positive electrode compartment, which are separated by an alkali ion conductive electrolyte membrane. An alkali metal negative electrode disposed in the negative electrode compartment oxidizes to release alkali ions as the cell discharges and reduces the alkali ions to alkali metal during recharge. The positive electrode compartment includes a positive electrode contacting a positive electrode solution that includes an alkali metal compound and a metal halide. The alkali metal compound can be selected from an alkali halide and an alkali pseudo-halide. During discharge, the metal ion reduces to form metal plating on the positive electrode. As the cell charges, the metal plating oxidizes to strip the metal plating to form metal halide or pseudo halide or corresponding metal complex.