SECONDARY BATTERY AND ELECTRONIC DEVICE
卷宗概要
申请人
SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
发明人
Jo SAITO; Yohei MOMMA; Kunihiro FUKUSHIMA; Shunsuke HOSOUMI; Kazuki TANEMURA; Tetsuya KAKEHATA; Shunpei YAMAZAKI; Toshikazu OHNO; Mayumi MIKAMI; Tatsuyoshi TAKAHASHI; Kazuya SHIMADA
IPC 分类
CPC 分类
The secondary battery includes a positive electrode active material which exhibits a broad peak at around 4.55 V in a dQ/dVvsV curve obtained when the charge depth is increased. The secondary battery includes a positive electrode active material which, even when the charge voltage is greater than or equal to 4.6 V and less than or equal to 4.8 V and the charge depth is greater than or equal to 0.8 and less than 0.9, does not have the H1-3 type structure and can maintain a crystal structure where a shift in CoOlayers is inhibited. The broad peak at around 4.55 V in the dQ/dVvsV curve indicates that a change in the energy necessary for extraction of lithium at around the voltage is small and a change in the crystal structure is small.
原文（中文）
The secondary battery includes a positive electrode active material which exhibits a broad peak at around 4.55 V in a dQ/dVvsV curve obtained when the charge depth is increased. The secondary battery includes a positive electrode active material which, even when the charge voltage is greater than or equal to 4.6 V and less than or equal to 4.8 V and the charge depth is greater than or equal to 0.8 and less than 0.9, does not have the H1-3 type structure and can maintain a crystal structure where a shift in CoOlayers is inhibited. The broad peak at around 4.55 V in the dQ/dVvsV curve indicates that a change in the energy necessary for extraction of lithium at around the voltage is small and a change in the crystal structure is small.