TY - JOUR
T1 - Polynitroxide-grafted-graphene
T2 - A superior cathode for lithium ion batteries with enhanced charge hopping transportation
AU - Lu, Chengyi
AU - Pan, Guang
AU - Huang, Qiaogao
AU - Wu, Haitao
AU - Sun, Wang
AU - Wang, Zhenhua
AU - Sun, Kening
N1 - Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - The emergence of organic nitrogen-oxide (NO) radical polymers has brought hope in the pursuit of high performance lithium-ion batteries (LIBs). However, the unstable conductivity has always caused the NO polymer electrodes to have inferior electrochemical performance. Herein, we constructed a new and remarkably conductive polynitroxide-grafted-graphene (NO-g-rGO) cathode that is similar to organic polymer cathodes with a high concentration of nitroxide radicals. Elevated levels of NO on the surface of reduced graphene oxide (rGO) were achieved via esterification between 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (HTEMPO) and a high concentration of carboxylated rGO. The fold on the surface of rGO shortens the distance of electron transport between radical monomers, thereby enhancing the conductivity of NO-g-rGO, which showed a high specific capacity of 256 mA h g -1 after 200 cycles. The dramatic performance of NO-g-rGO was achieved through promoting the conductivity of NO. As a novel concept, this work provides a fresh perspective on the application of organic radical cathodes in high energy density LIBs.
AB - The emergence of organic nitrogen-oxide (NO) radical polymers has brought hope in the pursuit of high performance lithium-ion batteries (LIBs). However, the unstable conductivity has always caused the NO polymer electrodes to have inferior electrochemical performance. Herein, we constructed a new and remarkably conductive polynitroxide-grafted-graphene (NO-g-rGO) cathode that is similar to organic polymer cathodes with a high concentration of nitroxide radicals. Elevated levels of NO on the surface of reduced graphene oxide (rGO) were achieved via esterification between 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (HTEMPO) and a high concentration of carboxylated rGO. The fold on the surface of rGO shortens the distance of electron transport between radical monomers, thereby enhancing the conductivity of NO-g-rGO, which showed a high specific capacity of 256 mA h g -1 after 200 cycles. The dramatic performance of NO-g-rGO was achieved through promoting the conductivity of NO. As a novel concept, this work provides a fresh perspective on the application of organic radical cathodes in high energy density LIBs.
UR - http://www.scopus.com/inward/record.url?scp=85062293071&partnerID=8YFLogxK
U2 - 10.1039/c9ta00218a
DO - 10.1039/c9ta00218a
M3 - Article
AN - SCOPUS:85062293071
SN - 2050-7488
VL - 7
SP - 4438
EP - 4445
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 9
ER -
