The Experts below are selected from a list of 51828 Experts worldwide ranked by ideXlab platform
Ping Zhou - One of the best experts on this subject based on the ideXlab platform.
-
a hydrogel coated porous sulfur particle as volume accommodable conductivity improved and polysulfide adsorptive cathode for lithium sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Ping ZhouAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
Arumugam Manthiram - One of the best experts on this subject based on the ideXlab platform.
-
core shell structured sulfur Polypyrrole composite cathodes for lithium sulfur batteries
RSC Advances, 2012Co-Authors: Yongzhu Fu, Arumugam ManthiramAbstract:A sulfur-Polypyrrole composite cathode with a core-shell structure consisting of spherical sulfur particles coated with Polypyrrole has been developed. The conductive Polypyrrole coating on the sulfur facilitates fast electron transport enabling the material with superior electrochemical stability, rate capability, and cyclability in lithium-sulfur batteries.
-
orthorhombic bipyramidal sulfur coated with Polypyrrole nanolayers as a cathode material for lithium sulfur batteries
Journal of Physical Chemistry C, 2012Co-Authors: Arumugam ManthiramAbstract:A sulfur–Polypyrrole composite consisting of orthorhombic bipyramidal sulfur particles (63.3 wt %) coated with a Polypyrrole nanolayer has been synthesized by a low-cost, scalable, environmentally benign process and investigated as a cathode material for Li-ion batteries. Cathodes containing the sulfur–Polypyrrole composite have been evaluated in half cells by cyclic voltammetry, galvanostatic cycling, and electrochemical impedance spectroscopy. The sulfur–Polypyrrole composite cathode shows better electrochemical stability, cyclability, and rate capability than pristine sulfur as the Polypyrrole coating acts as a conductive matrix for electron transfer while prohibiting lithium polysulfide dissolution. At C/5 rate, the sulfur–Polypyrrole composite cathode exhibits ∼200 mAh/g higher capacity than the pristine sulfur after 50 cycles. At C/2 and 1C rates, the composite shows significantly better capacity retention than the pristine sulfur over 100 cycles.
Jinyun Liu - One of the best experts on this subject based on the ideXlab platform.
-
a hydrogel coated porous sulfur particle as volume accommodable conductivity improved and polysulfide adsorptive cathode for lithium sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Ping ZhouAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
-
A hydrogel-coated porous sulfur particle as volume-accommodable, conductivity-improved, and polysulfide-adsorptive cathode for lithium‑sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Zhou Ping, Wu Yong, Gu CuipingAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
Gu Cuiping - One of the best experts on this subject based on the ideXlab platform.
-
A hydrogel-coated porous sulfur particle as volume-accommodable, conductivity-improved, and polysulfide-adsorptive cathode for lithium‑sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Zhou Ping, Wu Yong, Gu CuipingAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
Xirong Lin - One of the best experts on this subject based on the ideXlab platform.
-
a hydrogel coated porous sulfur particle as volume accommodable conductivity improved and polysulfide adsorptive cathode for lithium sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Ping ZhouAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
-
A hydrogel-coated porous sulfur particle as volume-accommodable, conductivity-improved, and polysulfide-adsorptive cathode for lithium‑sulfur batteries
Journal of Electroanalytical Chemistry, 2019Co-Authors: Jinyun Liu, Yu Chen, Wen Zhang, Xirong Lin, Haikuo Zhang, Zhou Ping, Wu Yong, Gu CuipingAbstract:Abstract Simultaneously achieving a high conductivity and a good volume-change accommodation for sulfur cathode in lithium‑sulfur batteries is highly required. Herein, we present a unique porous sulfur composite consisting of a porous sulfur particle coating with conductive hydrogel Polypyrrole, which is prepared through a templated method. The pores inside the sulfur particles offer a good buffering space for the volume expansion of sulfur upon lithiation; while the external Polypyrrole coating improves the conductivity and suppress the transfer of polysulfides. The porous sulfur@Polypyrrole composite exhibits a capacity of about 900 mAh g−1 after cycling for 100 times at 0.12 C, along with a good Coulombic efficiency around 99.9%, which is much better than the Polypyrrole-coated non-porous sulfur particles and pure sulfur particles. When cycled for 500 times, the capacity fading rate is as low as 0.09% per cycle. After three rounds of rate-performance measurements, the capacity retention of the sulfur@Polypyrrole at different rates remain above 97%. The density functional theory calculations and electrochemical impedance spectra demonstrate a polysulfide-adsorptive and a stable electric transportation surface of the sulfur@Polypyrrole composite, respectively.
