Binder-free ultrasonicated graphite flakes@carbon fiber cloth cathode for rechargeable aluminum-ion battery
Abstract
Aluminum battery offers a new possibility for low cost and large-scale stationary storage of electricity because it can be made with cheap materials and exhibits high theoretical mass specific capacity and power density. Among many cathodic materials, graphite/graphene may be one of the most promising cathode materials for aluminum-ion battery. A suitable three-dimensional structure of the cathode is an important factor for the high performance of battery. In this paper, a binder-free cathode is prepared by dropcasting small ultrasonicated graphite flakes (u-GF) on carbon fiber cloth (CFC) which provides a three-dimensional network skeleton for the new cathode. Al|EMImCl-1.3AlCl3|u-GF@CFC battery exhibits a high discharge specific capacity of ~140 mAh g-1 at 100 mA g-1. The battery has good rate performance and cycling stability: the capacity still exceeds 100 mAh g-1 at 600 mA g-1 with a high coulomb efficiency of 98% and maintains 60 mAh g-1 at 3000 mA g-1 over 300 cycles.
- Publication:
-
Journal of Power Sources
- Pub Date:
- October 2019
- DOI:
- 10.1016/j.jpowsour.2019.226950
- Bibcode:
- 2019JPS...43826950L
- Keywords:
-
- Aluminum-ion battery;
- Binder-free;
- u-GF@CFC cathode;
- High performance