Structural and electrochemical studies of alpha manganese dioxide ({alpha}-MnO{sub 2})

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:373809

Johnson, C S; Dees, D W; Mansuetto, M F; Thackeray, M M; Vissers, D R; Argyriou, D; Loong, C -K ^[1]; Christensen, L ^[2]

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1. Argonne National Lab., IL (United States)
2. Minnesota Mining and Mfg. Co., St. Paul, MN (United States)

The structural and electrochemical properties of alpha-MnO[sub 2], prepared by acid digestion of Mn[sub 2]O[sub 3], and its lithiated derivatives xLi[sub 2] O . MnO[sub 2] (where x is greater than or equal to zero and less than or equal to 0.25) have been investigated as insertion compounds in the search for new and viable cathode materials for rechargeable 3-V batteries. The alpha-MnO[sub 2] product fabricated by this technique contains water within the large (2x2) channels of the structure; the water can be removed from the alpha-MnO[sub 2] framework without degradation of the structure, and then at least partially replaced by Li[sub 2]O. The lithia-doped alpha-MnO[sub 2] electrodes, described generically as xLi[sub 2]O . Mno[sub 2], stabilize the structure and provide higher capacities on cycling than the parent material. The structures of these alpha- MnO[sub 2]-type electrode materials are described. and electrochemical data are presented for both liquid electrolyte and polymer electrolyte Li/alpha-MnO[sub 2] and Li/xLi[sub 2]O . MnO[sub 2] cells.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 373809
• Report Number(s): ANL/CMT/VU--89522; CONF-9606212--3; ON: DE96012719
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
40 CHEMISTRY
ELECTRIC BATTERIES
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
LITHIUM OXIDES
MANGANESE OXIDES
MOLECULAR STRUCTURE