Abstract
Aqueous zinc‐ion batteries (ZIBs) are an alternative energy storage system for large‐scale grid applications compared with lithium‐ion batteries, when the low cost, safety, and durability are taken into consideration. However, the reliability of the battery systems always suffers from the serious challenge of the large Zn dendrite formation and “dead Zn,” thus bringing out the inferior cycling stability, and even cell shorting. Herein, a dendrite‐free organic anode, perylene‐3,4,9,10‐tetracarboxylic diimide (PTCDI) polymerized on the surface of reduced graphene oxide (PTCDI/rGO) utilized in ZIBs is reported. Moreover, the theoretical calculations prove the reason for the low redox potential. Due to the protons and zinc ions coparticipant phase transfer mechanism and the high charge transfer capability, the PTCDI/rGO electrode provides superior rate capability (121 mA h g−1 at 5000 mA g−1, retaining the 95% capacity of that compared with 50 mA g−1) and a long cycling life span (96% capacity retention after 1500 cycles at 3000 mA g−1). In addition, the proton coparticipation energy storage mechanism of active materials is elucidated by various ex‐situ methods.
Highlights
Aqueous zinc-ion batteries (ZIBs) are an alternative energy storage system for uneven lithium distribution, especially the utilization of noxious organic electrolyte large-scale grid applications compared with lithium-ion batteries, when the brings about the environmental concern, low cost, safety, and durability are taken into consideration
The Zn metal anodes are under continual stripping/plating dynamic processes during charge and discharge, the safety and reliability of the battery systems always suffer from serious challenge of Considering the pressing demand regarding economic and sus- the large Zn dendrite formation caused by uneven Zn tainable energy storage system in the context of environmen- electrostripping/electroplating.[11,12]
Under the synergistic effect between the PTCDI and reduced graphene oxide, the assembled batteries achieve superior rate capability and a long cycling life span, even at discharge current of 5000 mA g−1, a high specific capacity of 121 mAh g−1 is obtained, retaining 95% of that compared with 50 mA g−1, the gap of discharge capacity from 50 to 5000 mA g−1 was minuscule
Summary
Aqueous zinc-ion batteries (ZIBs) are an alternative energy storage system for uneven lithium distribution, especially the utilization of noxious organic electrolyte large-scale grid applications compared with lithium-ion batteries, when the brings about the environmental concern, low cost, safety, and durability are taken into consideration. Under the synergistic effect between the PTCDI and reduced graphene oxide (rGO), the assembled batteries achieve superior rate capability and a long cycling life span, even at discharge current of 5000 mA g−1, a high specific capacity of 121 mAh g−1 is obtained, retaining 95% of that compared with 50 mA g−1, the gap of discharge capacity from 50 to 5000 mA g−1 was minuscule.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
