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COMPOSITE PARTICLE GROUP, NEGATIVE ELECTRODE ACTIVE MATERIAL PARTICLE GROUP, NEGATIVE ELECTRODE, BATTERY, AND COMPOSITE PARTICLES WITH EXPOSED CONVEX PARTS CONTAINED IN COMPOSITE PARTICLE GROUP
COMPOSITE PARTICLE GROUP, NEGATIVE ELECTRODE ACTIVE MATERIAL PARTICLE GROUP, NEGATIVE ELECTRODE, BATTERY, AND COMPOSITE PARTICLES WITH EXPOSED CONVEX PARTS CONTAINED IN COMPOSITE PARTICLE GROUP
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机译：复合粒子群，负极活性物质粒子群，负极，电池以及复合粒子群中包含凸部的复合粒子
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摘要
Provided is a composite particle group capable of achieving both excellent quick-charging performance and initial charging/discharging performance. Among the constituent multiple composite particles of the composite particle group, in multiple composite particles having multiple convex parts and a diameter equal to or greater than the median diameter (d50), amorphous carbon coatings on the surfaces of active material particles have an average areal coverage ratio of 50-90%. When regions where the surfaces of the active material particles are exposed by 1 µm2 or more in the composite particles are defined as exposed regions, the number density of the exposed regions with respect to the total surface area of the multiple composite particles is 0.0010 to 0.0500 region/µm2.
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