Mixed material of lithium iron phosphate and carbon, electrode containing same, battery comprising such electrode, method for producing such mixed material, and method for producing battery
AssigneeGS Yuasa International Ltd.
InventorsYoshinobu Yasunaga, Tokuo Inamasu, Akihiro Fujii, Toshiyuki Nukuda
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Abstract
Disclosed is a mixed material of lithium iron phosphate and carbon, which contains secondary particles as aggregates of lithium iron phosphate primary particles and a fibrous carbon which is present inside the secondary particles. An electrode containing such a mixed material, a battery comprising such an electrode, a method for producing such a mixed material, and a method for producing a battery are also disclosed.
Claims10
A mixed material comprising
- an aggregate of lithium iron phosphate particles;
- and
- fibrous carbon present inside the aggregate,
- wherein said fibrous carbon has a length ranging from 0.5 μm to 5 μm.
A method for producing a mixed material comprised of an aggregate of lithium iron phosphate particles and fibrous carbon present inside the aggregate, wherein said fibrous carbon has a length ranging from 0.5 μm to 5 μm,
- said method comprising
- providing lithium iron phosphate or a raw material of lithium iron phosphate in a container;
- subjecting an alcohol with a molecular weight of 100 or less to thermal decomposition in the container containing the lithium iron phosphate particles to form the mixed material comprised of the aggregate of the lithium iron phosphate particles and the fibrous carbon,
- wherein the fibrous carbon is formed from the thermal decomposition of the alcohol and does not include a carbon produced from a polymer of the alcohol, said polymer being a product of polymerization of the alcohol and having a molecular weight exceeding 100.
Dependencies are inferred from the claim text.