A Stretchable Graphitic Carbon/Si Anode Enabled by Conformal Coating of a Self‐Healing Elastic Polymer

Abstract

A high-capacity stretchable graphitic carbon/Si foam electrode is enabled by a conformal self-healing elastic polymer coating. The composite electrode exhibits high stretchability (up to 88%) and endures 1000 stretching-releasing cycles at 25% strain with detrimental resistance increase. Meanwhile, the electrode delivers a high reversible specific capacity of 719 mA g(-1) and good cycling stability with 81% capacity retention after 100 cycles.

The emerging era of supramolecular polymeric binders in silicon anodes

“…Therefore, the size of Si particles is also an important parameter to be considered for effective self-healing. Furthermore, the SHP binder was also used for a stretchable graphitic carbon/anode, 29 but it appears that further improvement is needed in terms of cycle life.…”

Microfluidic Patterning of Metal Structures for Flexible Conductors by In Situ Polymer‐Assisted Electroless Deposition

“…Flexible electronics, electronics that can function under mechanical deformation, is in high demand toward a wide variety of new applications, including wearable electronics, flexible displays, electronic skins, energy storage, medical implants, sensors, and biological actuators 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. To realize the function of these electronic devices, highly conductive electrodes, contacts, and interconnects with large mechanical flexibility (e.g., bending, folding, stretching, compressing, and twisting) are considered as one of the most important components.…”

Self‐Healing Materials for Next‐Generation Energy Harvesting and Storage Devices

“…Sun et al developed the first high-capacity stretchable graphitic carbon/ Si/self-healing elastic polymer electrode by rational design of a 3D foam structure (Figure 11c). [59] The resultant 3D foam electrodes exhibited high stretchability (average strain of 46.2%, best up to 88%) and good stability subjected to 1000 stretchingreleasing cycles at a strain of 25%. Moreover, the electrodes coated with an optimized amount of self-healing elastic polymer achieved a high specific capacity of 722 mA h g −1 after 100 charge/discharge cycles and a high capacity retention of 83%.…”

“…Self-healing Li-ion batteries can spontaneously heal these mechanical fractures or even severe damage, leading to enhancement of cycling stability of the device. To date, much emphasis has been placed on fabricating self-healing electrodes by designing intrinsic self-healing active metallic alloys [133,134] or incorporating self-healing polymer [59,[135][136][137][138] into electrode configuration to achieve the self-healing property for selfhealing Li-ion batteries.…”