公开(公告)号：US20160190570A1

公开(公告)日：2016-06-30

申请号：US14904371

申请日：2014-07-08

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Jumyeung LEE ,  Kyueun SHIM ,  Donggyu CHANG ,  Wooyoung Yang

IPC分类号： H01M4/38 ,  H01M4/62 ,  H01M4/134 ,  H01M4/36 ,  H01M10/052

摘要： Provided are an anode active material for a lithium secondary battery, and an anode composition and a lithium secondary battery including the anode active material. Silicon secondary particles, in which amorphous silicon primary particles and crystalline silicon primary particles are agglomerated, are used as an anode active material. The structural characteristics and internal pores of the silicon secondary particles act as a buffer for a volumetric change of particles, leading to a decrease in the volumetric expansion of an active material during charging and discharging. Accordingly, pulverization of silicon particles may be prevented, and ultimately, even when a charge and discharge cycle is repeatedly performed, the capacity is maintained, and thus, cycle lifespan characteristics are substantially improved.

摘要翻译： 提供了一种用于锂二次电池的负极活性材料，以及包含阳极活性材料的阳极组合物和锂二次电池。 将非晶硅一次粒子和结晶硅一次粒子聚集的硅二次粒子用作负极活性物质。 硅二次粒子的结构特征和内部孔隙作为颗粒体积变化的缓冲液，导致在充放电期间活性物质的体积膨胀减小。 因此，可以防止硅粒子的粉碎，最终，即使在重复进行充放电循环的情况下，也能够维持容量，从而显着提高循环寿命。

公开(公告)号：US20160329556A1

公开(公告)日：2016-11-10

申请号：US15108127

申请日：2014-08-22

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Kyueun SHIM ,  Jumyeung LEE ,  Donggyu CHANG ,  Wooyoung YANG

IPC分类号： H01M4/134 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/1395

CPC分类号： H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/386 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

摘要： The present invention relates to a production method for a negative electrode active material for a lithium secondary battery, and to a lithium secondary battery, and provides a production method for a lithium secondary battery negative electrode active material that is produced by mechanically grinding or crushing, in dry or wet conditions, particulate silicon, which is in a secondary particle state formed by agglomerating crystalline and amorphous silicon primary particles.

摘要翻译： 本发明涉及一种锂二次电池用负极活性物质和锂二次电池的制造方法，提供了通过机械研磨或粉碎而制造的锂二次电池负极活性物质的制造方法， 在干燥或潮湿的条件下，通过结晶和非晶硅一次粒子聚结而形成二次粒子状态的微粒硅。