Development of coin-type lithium secondary batteries containing manganese dioxide/Li---Al

In order to develop a secondary battery with high energy density, several characteristics of coin-type cells using lithium-containing manganese dioxide as a positive material are investigated. Cells prepared from LiOH and electrolytic manganese dioxide (EMD) display higher energy density (177 Wh l−1; 63 Wh kg−1) than those prepared from LiOH and chemical manganese dioxide (CMD). LiOH · EMD has better cycle characteristics and storage characteristics than LiOH · CMD. Lithium-containing manganese dioxide (LiOH · EMD)/Li---Al batteries have high reliability against overcharge and overdischarge.