A secondary lithium ion cell having an anode, a cathode and a nonaqueous electrolyte wherein the cathode comprises sub-micron-size amorphous, microporous, lithium-intercalateable manganese oxide having an internal surface area greater than about 100 m.sup.2 /g. The cathode may include an electrically conductive lithium-intercalateable polymer binder. A sol-gel process for making the amorphous quatravalent manganese oxide is disclosed.

Disclosed is a process for treating manganese dioxide containing ion-exchangeable cations by replacing the ion-exchangeable cations present in the manganese dioxide with lithium by a process comprising first replacing ion-exchangeable cations present in the manganese dioxide with hydrogen. This readily is accomplished by slurrying the manganese dioxide in an aqueous acid solution. The resulting acidic manganese dioxide then is neutralized with a basic solution of a lithium containing compound, s...

Bismuth manganese oxide pigments are used as additives to various materials such as plastics, plastic or organic coating compositions, glass and ceramic coating compositions, and the like. The bismuth manganese oxide pigments preferably comprise Bi.sub.2 Mn.sub.4 O.sub.10 crystallized in the orthorhombic crystal structure. The pigments possess improved reflectance characteristics, particularly in the IR region, and may reduce IR-induced heat buildup.

The invention is a process which provides a high purity lithiated manganese oxide (Li.sub.1+x Mn.sub.2-y O.sub.4) from chemically made MnO.sub.2. The lithiated manganese oxide has an especially effective utility for use as a cathodic material in rechargeable batteries. The process of the invention includes blending a lithium compound with a chemically made manganese dioxide to form a manganese dioxide/lithium compound blend. The lithium compound in the blend is at least about one mole of lithium...

A lithiated manganese dioxide for use in primary lithium electrochemical cells. The lithiated manganese dioxide is prepared by stepwise treatment with a liquid source of lithium cations that can include an aqueous solution of a lithium base or a low melting point lithium salt resulting in formation of a lithiated manganese dioxide product. Lithium cations in the lithium base or molten lithium salt can be ion-exchanged with hydrogen ions in the manganese dioxide crystal lattice and additional lit...

Compounds and methods of preparing compounds represented by structural formula (I): ##STR1## wherein X represents any suitable counter-anion; R.sup.1 and R.sup.2 independently represent hydrogen, C.sub.1-6 alkoxy or nitro; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each independently represents hydrogen, hydroxy, halo, C.sub.1-6 alkyl, C.sub.2-6 alkenyl or C.sub.1-6 alkoxy; and R.sup.7, R.sup.8, R.sup.9 and R.sup.10 each independently represents hydrogen, hydroxy, halo, C.sub.1-6 alkyl, C.sub.2-6 alk...

Lithium manganese oxide particles have been produced with an average diameter less than about 250 nm. The particles have a high degree of uniformity. The particles are formed by the heat treatment of nanoparticles of manganese oxide. The lithium manganese oxide particles are useful as active materials in the positive electrodes of lithium based batteries. Improved batteries result from the use of the uniform nanoscale lithium manganese oxide particles.

A process for preparing a dinuclear manganese complex of formula (A) ##STR1## wherein: Mn represents manganese in the III or IV oxidation state, each X is independently a co-ordinating or bridging species selected from H.sub.2 O, O.sub.2.sup.-, O.sup.2-, OH.sup.-, SH.sup.-, S.sup.2-,>S=O, Cl.sup.-, N.sub.3.sup.-, SCN.sup.-, N.sup.3-, RCOO.sup.-, NH.sub.2.sup.- and NR.sub.3 where R is hydrogen, alkyl or aryl (optionally substituted); L is a ligand which is an organic molecule containing at lea...

During repeated cycling of alkaline manganese dioxide cells, it is critical to ensure that adequate barrier protection is formed and maintained between the anode and cathode of the cell to prevent shorts from occurring between the cathode and the anode. However, the potential also exists for anodic zinc to migrate via the absorbent separator and create a short path to the cathode. To prevent this, cells can be fabricated whereby a separator barrier is placed into the cells, a hot melt sealant is...

A process is described for the preparation of a compound having the formula: ##STR1## wherein Mn is manganese in a III or IV oxidation state; X is independently selected from a coordinating or bridging species selected from the group consisting of: H.sub.2 O, O.sub.2.sup.2-, O.sub.2-, OH.sup.-, HO.sub.2.sup.-, SH.sup.-, S.sup.2-, SO, Cl.sup.-, N.sub.3.sup.-, SCN.sup.-, N.sup.3-, HCOO.sup.-, NH.sub.2.sup.- and NH.sub.3 ; L is an organic ligand that is at least a nine-membered ring wherein at leas...