Amorphous and Nanocrystalline Oxide Electrodes for Rechargeable Lithium Batteries

1997 ◽  
Vol 496 ◽  
Author(s):  
A. Manthiram ◽  
J. Kim ◽  
C. Tsang
Keyword(s):  
Lithium Batteries ◽  
Manganese Oxides ◽  
Reversible Capacity ◽  
Molybdenum Oxides ◽  
Rechargeable Lithium Batteries ◽  
Binary Oxides ◽  
Oxide Electrodes ◽  
Potassium Borohydride ◽  
Metastable Structure ◽  
Nanocrystalline Oxide

ABSTRACTOxo ions (MO4)n- (M = V, Cr, Mn and Mo) have been reduced in aqueous solutions with potassium borohydride to obtain the binary oxides MO2+δ. While the vanadium and manganese oxides are nanocrystalline, the chromium and molybdenum oxides are amorphous. The nanocrystalline VO2 having a metastable structure and the amorphous CrO2 and MoO2.3 transform to the thermodynamically more stable phases upon heating above 300–400 °C. These metastable oxides after heating in vacuum at 200–300 °C to remove water show good electrode performance in lithium cells. VO2, CrO2 and MoO2.3 show a reversible capacity of, respectively, 290 mAh/g in the range 4–1.5 V, 180 mAh/g in the range 3.3–2.3 V, and 220 mAh/g in the range 3–1 V. MnO2 obtained by this process does not show good electrode properties.

Anode property of carbon coated LiFePO4 nanocrystals

2016 ◽  
Vol 09 (01) ◽  
pp. 1650004 ◽  
Author(s):  
Jiangfeng Ni ◽  
Jiaxing Jiang ◽  
S. V. Savilov ◽  
S. M. Aldoshin
Keyword(s):  
Cathode Material ◽  
Lithium Batteries ◽  
Reversible Capacity ◽  
Rechargeable Battery ◽  
Potential Range ◽  
Rechargeable Lithium Batteries ◽  
Capacity Fading ◽  
High Reversible Capacity ◽  
Carbon Coated ◽  
A Current

Nanostructured LiFePO4 is appealing cathode material for rechargeable lithium batteries. Herein, however, we report the intriguing anode properties of carbon coated LiFePO4 nanocrystals. In the potential range of 0–3.0 V, the LiFePO4 nanocrystal electrodes afford high reversible capacity of 373 mAh[Formula: see text]g[Formula: see text] at a current rate of 0.05 A[Formula: see text]g[Formula: see text] and retains 239 mAh[Formula: see text]g[Formula: see text] at a much higher rate of 1.25 A[Formula: see text]g[Formula: see text]. In addition, it is capable of sustaining 1000 cycles at 1.25 A[Formula: see text]g[Formula: see text] without any capacity fading. Such superior properties indicate that nanostructured LiFePO4 could also be promising anode for rechargeable battery applications.

Structural aspects of lithium-manganese-oxide electrodes for rechargeable lithium batteries

1990 ◽  
Vol 25 (2) ◽  
pp. 173-182 ◽  
Author(s):  
MH Rossouw ◽  
A de Kock ◽  
LA de Picciotto ◽  
MM Thackeray ◽  
WIF David ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Lithium Batteries ◽  
Lithium Manganese Oxide ◽  
Rechargeable Lithium Batteries ◽  
Oxide Electrodes ◽  
Lithium Manganese ◽  
Structural Aspects

The stabilization of layered Manganese Oxides for use in Rechargeable Lithium Batteries

1999 ◽  
Vol 575 ◽  
Author(s):  
M. Stanley Whittingham ◽  
Peter Zavalij ◽  
Fan Zhang ◽  
Pramod Sharma ◽  
Gregory Moore
Keyword(s):  
Hydrothermal Synthesis ◽  
Lithium Batteries ◽  
Manganese Oxides ◽  
Single Phase ◽  
High Rate ◽  
Manganese Ions ◽  
Cobalt Doping ◽  
Rechargeable Lithium Batteries ◽  
Lithium Manganese Oxides ◽  
Interlayer Region

ABSTRACTThe layered structure LixTiS2 and LixCoO2 are excellent reversible cathodes for lithium batteries. However, layered lithium manganese oxides are metastable relative to the spinel form on cycling in lithium batteries. They may be stabilized in the layer form by insertion of larger ions such as potassium in the interlayer region, which minimizes the diffusion of the manganese ions from the MnO2 blocks. Their low conductivity is an impediment to their use in high rate batteries. Cobalt can be doped into the layered alkali manganese dioxides, MxMn1-yCoyO2 for M = K or Na, during the hydrothermal synthesis from the alkali permanganates. A single phase is obtained up to about 5% mole cobalt. The cobalt doping is found to enhance the conductivity by two orders of magnitude relative to pure KxMnO2.

Lithium manganese oxides for rechargeable lithium batteries

1997 ◽  
Vol 68 (1) ◽  
pp. 166-172 ◽  
Author(s):  
Yoshiaki Nitta ◽  
Kazuhiro Okamura ◽  
Masatoshi Nagayama ◽  
Akira Ohta
Keyword(s):  
Lithium Batteries ◽  
Manganese Oxides ◽  
Rechargeable Lithium Batteries ◽  
Lithium Manganese Oxides ◽  
Lithium Manganese
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