Structural and optical properties of ZnGa 2 O 4 :Ge 4ΓΎ and ZnGa 2 O 4 :Ge 4ΓΎ , Li ΓΎ , Mn 2ΓΎ phosphors were investigated by using X-ray diffraction (XRD), photoluminescence (PL) and cathodoluminescence (CL) measurements. The XRD patterns show that Ge-doped ZnGa 2 O 4 has a spinel phase and its lattic
Enhanced capacity retention of Co and Li doubly doped LiMn2O4
β Scribed by Changyin Wang; Shigang Lu; Surong Kan; Jing Pang; Weiren Jin; Xiangjun Zhang
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 738 KB
- Volume
- 189
- Category
- Article
- ISSN
- 0378-7753
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π SIMILAR VOLUMES
packed structures was further extended by Goodenough's group to 3-D materials with the spinel structure (3). It was Lithium manganospinels belonging to the LiMn 2 O 4 -Li 2 Mn 4 O 9 -Li 4 Mn 5 O 12 system were prepared by solid-state reac-shown that lithium could be intercalated into the spinels tio
XRD measurements proved the coexistence of spinel, lithiumrich spinel, and rock-salt phases in the Li-Mn-O system. An investigation of the electrical properties, carried out on polycrystalline samples, shows that Li 2 MnO 3 has insulating behavior while the spinel phases provide an example of hoppin