Detail of "11129-60-5"

Reference

Manganese oxides as battery cathodes

Manganese oxides as battery cathodes. Goodenough, John B. (Inorg. Chem. Lab., Univ. Oxford, Oxford OX1 3QR, UK). Proc. - Electrochem. Soc., 85-4(Manganese Dioxide Electrode Theory Pract. Electrochem. Appl.), 77-96 (English) 1985. CODEN: PESODO. ISSN: 0161-6374. DOCUMENT TYPE: Journal; General Review CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 68 A review with 24 refs. Electronic as well as structural complexities assocd. with Li insertion/extn. reactions are illustrated in some cryst. materials exhibiting a Mn4+/3+ mixed valence. In particular, Li+-ion diffusion is demonstrated within a close-packed anion array having the 3-dimensional framework structure of the [Mn2]O4 subarray of the spinel structure. A miscibility gap between cubic and tetragonal frameworks results in a flat discharge curve for the system Li1+x[Mn2]O4 for x 0.1-0.8, but the kinetics of the insertion reaction is also reduced. The tetragonal phase represents a cooperative Jahn-Teller distortion induced by a high Mn3+-ion concn.; such distortions must be a common feature of insertion cathodes operating on a Mn4+/3+ couple. In addn., lithiation of b-MnO2 resulted in a spinel-related tetragonal phase Li2-y[Mn2]O4. Electrochem. extn. of Li from the spinel Li[Mn2]O4 is anomalous near the compn. Li0.5[Mn2]O4 and provides indirect evidence for Li+-ion ordering among the tetrahedral sites of the spinel structure at this compn.

Manganese oxides, their manufacture, and batteries using them as cathode active materials

Manganese oxides, their manufacture, and batteries using them as cathode active materials. Kumata, Naoki; Numata, Koichi; Hirayama, Shigeo (Mitsui Mining and Smelting Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2004137129 A2 13 May 2004, 8 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C01G045-02. ICS: H01M004-06; H01M004-50; H01M006-08. APPLICATION: JP 2002-305210 21 Oct 2002. DOCUMENT TYPE: Patent CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 49, 72 Mn oxides (Mn valency ￡4) are treated with solns. having redn. potential higher than that of Mn oxides to give Mn oxides having av. Mn oxidn. no. 3.8-4.0 and elec. potential at pH 14 of 280-400 mV (vs. Hg/HgO). Batteries (e.g., alk. dry-cell batteries) using the Mn oxides as cathode active materials exhibit good high-rate pulse characteristics.