Positive active material for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery
AssigneeGS Yuasa International Ltd.
InventorsYukiko Fujino, Yoshinobu Yasunaga, Toru Tabuchi, Tokuo Inamasu, Toshiyuki Nukuda
Life of this patent
Estimating the term…
Abstract
An object is to provide a positive active material for nonaqueous electrolyte secondary battery, which is capable of providing a battery with excellent cycle performance. Provided are a positive active material for nonaqueous electrolyte secondary battery, which includes an Fe-containing lithium vanadium phosphate compound having a NASICON-type structure, wherein in the Fe-containing lithium vanadium phosphate compound, the percentage of iron atoms relative to the sum of vanadium and iron atoms is 2% or more and 20% or less; and the like.
Claims8
A positive active material for nonaqueous electrolyte secondary battery, comprising an Fe-containing lithium vanadium phosphate compound having a NASICON-type structure,
- wherein the Fe-containing lithium vanadium phosphate compound contains at least lithium (Li), vanadium (V), and iron (Fe) as metal elements, with the percentage of iron atoms relative to the sum of vanadium and iron atoms being 5% or more and 10% or less,
- further comprising a conductive carbonaceous material, wherein the conductive carbonaceous material is coated on a surface of the Fe-containing lithium vanadium phosphate compound that is in the form of particles.
Dependencies are inferred from the claim text.