Lithium Storage Mechanisms
and Effect of Partial Cobalt
Substitution in Manganese Carbonate Electrodes
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Abstract
A promising group of inorganic salts recently emerged
for the negative
electrode of advanced lithium-ion batteries. Manganese carbonate combines
low weight and significant lithium storage properties. Electron paramagnetic
resonance (EPR) and magnetic measurements are used to study the environment
of manganese ions during cycling in lithium test cells. To observe
reversible lithium storage into manganese carbonate, preparation by
a reverse micelles method is used. The resulting nanostructuration
favors a capacitive lithium storage mechanism in manganese carbonate
with good rate performance. Partial substitution of cobalt by manganese
improves cycling efficiency at high rates