Lithium LiNiO.5MnO

The high cost and toxicity of cobalt compounds has prompted a search for alternative materials that intercalate lithium ions. Examples of these are LiMn204 [iv], LiCoo.2Nio.8O2. LiNio.5Mni.504 [v], LiNio.5Mno.5O2 [vi], LiFeP04 [vii], Lix VO [viii], and LixMrVOz (M = Ca, Cu) [ix], etc. 

Ohzuku, T. Makimura, Y. Layered lithium insertion material of LiNio.5Mno.5O2 a possible alterative to LiCo02 for advanced lithium-ion batteries. Chem. Lett. 2001, 30, 744. 

An advantage to these materials and related Li-rich materials (where excess lithium replaces some of the transition metal ions on 3b sites, but the Mn content still equals that of the Ni content) is decreased cation mixing. This improves rate capability [74] as compared to LiNio.5Mno.5O2. 

In the layered Lii Coo,i5Nio.8502 system, pinning of Epc at the top of the 0-2p bands gave an intrinsic limit of 3.8 V versus Lithium for the Ni(IV)/Ni(lll) couple. Removal of nearly aU the Li from the layered oxide LiNio.5Mno.5O2 containing Mn... 

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