Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 40, Pages 15589-15596Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta06317a
Keywords
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Funding
- State Key 973 Program of PRC [2011CB605704]
- Research Foundation of Shanghai Academy of Spaceflight Technology [SAST2016110]
- National Natural Science Foundation of China [U1201241, 51372041, 51202034, 51201035]
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Flexible energy storage devices that can function under considerable physical deformation have shown great promise for applications in portable electronics. In this work, we report for the first time a novel design of all-solid-state symmetric supercapacitors (SCs) based on free-standing ultrathin boron-doped graphene paper (B-GP) electrodes with boron-enriched gel polymer electrolytes (GPEs). Specifically, the B-GP electrodes integrated with B-containing GPEs not only introduce more electrochemically active sites for absorption/desorption of electrolyte ions, but also facilitate diffusion of the electrolyte during charging/discharging processes. The novel design of B-GP with B-containing GPEs endows our symmetric SC with a voltage of 2.5 V, an unprecedented energy density of 39.31 W h kg(-1) (with a power density of 1.44 kW kg(-1)), a stable cycling performance (a capacity retention of 90% after 3000 continuous charge/discharge cycles), good rate capability, distinguished mechanical flexibility and temperature resistant stability. This work provides a promising candidate to design a new generation of electrochemical SCs for energy storage devices.
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