Abstract
Thermal management remains one of the major challenges in the design of safe and reliable Li-ion batteries. We show that composite electrodes assembled from commercially available 100 μm long carbon nanotubes (CNTs) and LiCoO2 (LCO) particles demonstrate the in-plane thermal conductivity of 205.8 W/m*K. This value exceeds the thermal conductivity of dry conventional laminated electrodes by about three orders of magnitude. The cross-plane thermal conductivity of CNT-based electrodes is in the same range as thermal conductivities of conventional laminated electrodes. The CNT-based electrodes demonstrate a similar capacity to conventional laminated design electrodes, but revealed a better rate performance and stability. The introduction of diamond particles into CNT-based electrodes further improves the rate performance. Our lightweight, flexible electrode design can potentially be a general platform for fabricating polymer binder- and aluminum and copper current collector-free electrodes from a broad range of electrochemically active materials with efficient thermal management.
Original language | English (US) |
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Pages (from-to) | 702-710 |
Number of pages | 9 |
Journal | Carbon |
Volume | 129 |
DOIs | |
State | Published - Apr 2018 |
Externally published | Yes |
Keywords
- Binder-free
- CNTs
- Carbon black-free
- Current collector-free
- Diamond
- LCO
- Li-ion battery
- LiCoO
- Thermal conductivity
ASJC Scopus subject areas
- General Chemistry
- General Materials Science