公开(公告)号：US20170054138A1

公开(公告)日：2017-02-23

申请号：US14978958

申请日：2015-12-22

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jeung Ku KANG ,  Gyu Heon LEE ,  Jung Woo LEE ,  Sang Jun KIM

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/48 ,  H01M4/62

CPC classification number: H01M4/0428 ,  C01B32/186 ,  C01G23/053 ,  C01P2004/04 ,  C01P2004/64 ,  C01P2006/16 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/625 ,  H01M10/0525

Abstract: Disclosed is a negative electrode material for a lithium secondary battery, using a layer structure of porous graphene and metal oxide nanoparticles, with remarkably fast charge/discharge characteristics and long cycle life characteristics, wherein macropores of the porous graphene and a short diffusion distance of the metal oxide nanoparticles enable rapid migration and diffusion of lithium ions. The present invention may achieve remarkably fast charge/discharge behaviors and exceedingly excellent cycle life characteristics of 10,000 cycles or more even under a current density of 30,000 mA·g−1. Accordingly, the structure of the present invention may implement very rapid charge/discharge characteristics and stable cycle life characteristics while having high capacity by combining the structure with negative electrode nanostructures of the porous graphene network structure, and thereby being widely used in a variety of applications.

Abstract translation: 公开了一种使用多孔石墨烯和金属氧化物纳米粒子的层结构的锂二次电池用负极材料，具有非常快的充电/放电特性和较长的循环寿命特性，其中多孔石墨烯的大孔和短的扩散距离 金属氧化物纳米粒子能够快速迁移和扩散锂离子。 即使在30000mA·g-1的电流密度下，本发明也可以实现10,000次以上的充分/放电特性的极快的循环寿命特性。 因此，本发明的结构可以通过将结构与多孔石墨烯网络结构的负极纳米结构组合而具有高容量而实现非常快的充电/放电特性和稳定的循环寿命特性，从而广泛应用于各种应用中 。