Energy Density of Cylindrical Li-Ion Cells: A Comparison of Commercial 18650 to the 21700 Cells

被引：135
作者：
Quinn, Jason B. [1 ]
Waldmann, Thomas [1 ]
Richter, Karsten [1 ]
Kasper, Michael [1 ]
Wohlfahrt-Mehrens, Margret [1 ]
机构：
[1] ZSW Zentrum Sonnenenergie & Wasserstoff Forsch Ba, D-89081 Ulm, Germany
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 14期
关键词：
ELECTROCHEMICAL PERFORMANCE; LITHIUM DEPOSITION; THICK ELECTRODES; AGING MECHANISM; BATTERIES; COST;
D O I：
10.1149/2.0281814jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The standard format for cylindrical Li-ion cells is about to change from 18650-type cells (18mm diameter, 65mm height) to 21700-type cells (21mm diameter, 70mm height). We investigated the properties of five 18650 cells, three of the first commercially available 21700, and three types of the similar 20700 cells in detail. In particular, the (i) specific energy/energy density and electrode thickness, (ii) electrode area and cell resistance, (iii) specific energy as a function of discharge C-rate, as well as (iv) heating behavior due to current flow are analyzed. Finally, the production effort for cells and packs are roughly estimated for 21700 cells compared to 18650 cells. (C) The Author(s) 2018. Published by ECS.
引用
收藏
页码：A3284 / A3291
页数：8
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