COMPOSITE GRAPHITE PARTICLE FOR NONAQUEOUS-SECONDARY-BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, AND NONAQUEOUS SECONDARY BATTERY
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United States of America Patent
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Mar 18, 2015
filing date -
Sep 19, 2012
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Abstract
An object of the invention is to provide composite graphite particles (C) for nonaqueous-secondary-battery negative electrode, wherein metallic particle (B) capable of alloying with Li are present in inner parts thereof in a large amount. The invention relates to a composite graphite particle (C) for nonaqueous-secondary-battery negative electrode, the composite graphite particle (C) comprising a graphite (A) and a metallic particle (B) capable of alloying with Li, wherein when a section of the composite graphite particle (C) is examined with a scanning electron microscope, a folded structure of the graphite (A) is observed and a presence ratio of the metallic particle (B) in the composite graphite particle (C), as calculated by a specific measuring method, is 0.2 or higher.
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