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首页> 外国专利> COMPOSITE GRAPHITE PARTICLE FOR NONAQUEOUS SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL CONTAINING THE SAME COMPOSITE GRAPHITE PARTICLES, NEGATIVE ELECTRODE, AND NONAQUEOUS SECONDARY BATTERY

COMPOSITE GRAPHITE PARTICLE FOR NONAQUEOUS SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL CONTAINING THE SAME COMPOSITE GRAPHITE PARTICLES, NEGATIVE ELECTRODE, AND NONAQUEOUS SECONDARY BATTERY

机译：非球面二次电池用复合石墨颗粒，包含相同石墨颗粒的负电极材料，负电极和非二次电池

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摘要

PPROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery which exhibits a small irreversible charge and discharge capacity at initial cycles even if an active material layer is more highly densified. PSOLUTION: Composite graphite particles organized by spherical graphite particles and binder graphite satisfy either of the following requirements (a) to (g): (a) the spherical graphite particles are at least partially exposed on the surfaces of the composite graphite particles; (b) incomplete laminated structures of the spherical graphite particles are provided in the vicinity of the surfaces of composite graphite particles; (c) when median diameters of the spherical graphite articles and composite graphite particles are set up to be a and b, respectively, a ratio of a to b: c=a/b is to be 0.93 or more; (d) the graphite particles has a Raman R value of 0.15 to 0.25, an average circularity of 0.85 or above, a tap density of 0.87 to 1.25 g/cmSP3/SP, a BET specific surface area of 2.5 to 8 mSP2/SP/g; (e) a volume of pores of 0.01 to 2 m is to be 0.05 to 1 mL/g; (f) a quantity of CO radicals existing on the surface specified by the BET specific surface area is set up to be 1.15 to 5 mol/mSP2/SP; (g) when a specific electrolytic solution is dropped on an electrode made by using the composite graphite particles, the average number of hours where the electrolytic solution completely disappears from the surface of the electrode is 180 seconds or less. PCOPYRIGHT: (C)2008,JPO&INPIT
机译：

要解决的问题：提供一种非水二次电池，即使活性物质层更加致密，该非水二次电池在初始循环时仍具有较小的不可逆充电和放电容量。

解决方案：由球形石墨颗粒和粘结剂石墨组成的复合石墨颗粒满足以下要求（a）至（g）：（a）球形石墨颗粒至少部分暴露在复合石墨颗粒的表面上; （b）在复合石墨粒子的表面附近设置球形石墨粒子的不完全的层叠结构。 （c）当将球形石墨制品和复合石墨颗粒的中值直径分别设置为a和b时，a与b的比例：c ＝ a / b为0.93或更大; （d）石墨颗粒的拉曼R值为0.15至0.25，平均圆形度为0.85或更高，振实密度为0.87至1.25 g / cm 3 ，BET比表面积为2.5至8 m 2 / g; （e）0.01至2 m的孔体积应为0.05至1 mL / g; （f）将由BET比表面积指定的表面上存在的CO自由基的量设定为1.15至5 mol / m 2 ; （g）当将特定的电解液滴在使用复合石墨颗粒制成的电极上时，电解液从电极表面完全消失的平均小时数为180秒或更短。

版权：（C）2008，日本特许厅＆INPIT

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