Three-Dimensionally Aligned Sulfur Electrodes by Directional Freeze Tape Casting [component]

Rational design of sulfur electrodes is exceptionally important in enabling a high performance lithium/sulfur cell. Constructing a continuous pore structure of the sulfur electrode that enables facile lithium ion transport into the electrode and mitigates the reconstruction of sulfur is a key factor for enhancing the electrochemical performance. Here, we report a three-dimensionally (3D) aligned sulfur electrode cast onto conventional aluminium foil by directional freeze tape casting. The 3D
more » ... casting. The 3D aligned sulfur-graphene oxide (S-GO) electrode consisting of a few micronthick S-GO layers with 10-20 μm interlayer spacings demonstrates significant improvement in the performance of the Li/S cell. Moreover, the freeze tape cast graphene oxide electrode exhibits homogenous reconfiguration behaviour in the polysulfide catholyte cell tests, and demonstrated extended cycling capability with only 4 % decay of the specific capacity over 200 cycles. This work emphasizes the critical importance of proper structural design for sulfurcarbonaceous composite electrodes. TEXT The continued development of electrochemical energy storage and conversion systems (e.g. batteries, fuel cells and supercapacitors) has made a tremendous impact on the infrastructure of modern society. Rechargeable batteries, as represented by lithium ion cells, have been adopted in numerous electronic devices such as cell phones, laptops, smart pads, and various household
doi:10.1021/acs.nanolett.9b01805.s001 fatcat:xkw75475indirasrpwvcypzc4m