LiNio.5Mno.5O2

Figure 15. Ragone plot for LiNio.5Mno.5O2 showing the capacity of the cathode as a function of the discharge current density (data from ref 258).

Figure 19. Magnetic behavior of LiNio.5Mno.5O2, LiNio.4-Mno.4Coo.2O2, and LiNio.33Mno.33Coo.33O2 (a) susceptibility and (b) field effect (after Ma et al.).276...

LiCoo.5 Mno.502 LiFeo.5Mno.5O2 LiNio.5Mno.5O2 LiCoo.5Tio.5O2... 

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. 

Fig. 2.4 A transition metal layer in LiNio.5Mno.5O2 showing the flower pattern. Li is represented by the large gray circles, Mn by small white circles, and Ni by black circles (Used with pmnissirai from Ref. [71])...

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. 

Yoon W-S, Grey CP, Balasubramanian M, Yang X-Q, McBreen J (2003) In situ x-ray absorption spectroscopic study on LiNio.5Mno.5O2 cathode material during electrochemical cycling. Chem Mater 15 3161-3169... 

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... 

Meng YS, Ceder G, Grey CP, Yoon W-S, Shao-Hom Y (2004) Understanding the crystal structure of layered LiNio.5Mno.5O2 by electron diffraction and powder diffraction simulation. Eiectrochem Solid State Lett 7(6) A155-A158... 

Recent studies have shown that partial substitution of manganese in LiNio.5Mno.5O2 not only provides high capacities ( 200 mAhg ), but also results in a significant improvement in thermal stability compared to LiNi02 [37]. The increase in capacity and thermal stability is associated with the substitution of chemically more stable Mn + ions for Ni +. Recently, the mixed layered oxide... 

Abdel-Ghany A, Zaghib K, Gendron F, Manger A, Jnlien CM (2007) Structural, magnetic and electrochemical properties of LiNio.5Mno.5O2 as positive electrode fin Li-itm batteries. Electrochim Acta 52 4092 100... 

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