Results 281 to 290 of about 873,347 (342)

Boosting the energy density of supercapacitors by encapsulating a multi-shelled zinc-cobalt-selenide hollow nanosphere cathode and a yolk-double shell cobalt-iron-selenide hollow nanosphere anode in a graphene network.

Nanoscale, 2020
The practical exploration of electrode materials with complex hollow structures is of considerable significance in energy storage applications. Mixed-metal selenides (MMSs) with favorable architectures emerge as new electrode materials for supercapacitor
Akbar Mohammadi Zardkhoshoui, S. S. Hosseiny Davarani   +1 more
semanticscholar   +1 more source

Triggering of ionization oscillations in hollow cathode discharge by keeper electrode

Physics of Plasmas, 2019
The keeper electrode was believed to be beneficial for improving the hollow cathode performance. However, this paper shows that it can also be hazardous to the discharge if not treated properly.
Tian-Hang Meng, Zhong-Xi Ning, Da-Ren Yu
semanticscholar   +1 more source

N/O dual-doped hollow carbon microspheres constructed by holey nanosheet shells as large-grain cathode host for high loading Li-S batteries

, 2020
Lithium-sulfur (Li-S) battery is one of the most prospective energy storage systems beyond lithium ion battery technologies owing to its super-high theoretical energy density and low cost.
Xuejun Zhou, Jing Tian, Qingping Wu, Jiu-Lin Hu, Chi-Lin Li   +4 more
semanticscholar   +1 more source

Collisionless instability of the cathode sheath in a hollow-cathode discharge

Physical Review Letters, 1993
High-intensity periodic variations of the potential fall across the cathode sheath are observed in a low-pressure magnetic-field-free hollow-cathode discharge. These potential variations cause modulation of the discharge current, reaching a depth of almost 100%.
, Arbel, , Bar-Lev, , Felsteiner, , Rosenberg, , Slutsker   +4 more
openaire   +2 more sources

Enhanced rate and cycling performances of hollow V2O5 nanospheres for aqueous zinc ion battery cathode

, 2020
Vanadium pentoxides (V2O5) show potential in aqueous zinc ion batteries (AZIBs) originating from their layered structure and high theoretical capacity.
Lin-lin Chen, Zhan-Hong Yang, F. Cui, Jinlei Meng, Hongzhe Chen, Xiao Zeng   +5 more
semanticscholar   +1 more source

Hollow cathode effects in charge development processes in transient hollow cathode discharges

IEEE Transactions on Plasma Science, 1995
A detailed experimental study of space charge formation and ionization growth in transient hollow cathode discharges (THCD) is presented. The experiment was performed with an applied step voltage up to 30 kV, with rise time less than 50 ns. The discharge was operated in different gases, at pressures in the range 50-750 mTorr, with cathode apertures ...
M. Favre, P. Choi, H. Chuaqui, Y. Kaufman, J. Moreno, E. Wyndham, M. Zambra   +6 more
openaire   +2 more sources

Hollow CuS Nanoboxes as Li‐Free Cathode for High‐Rate and Long‐Life Lithium Metal Batteries

Advanced Energy Materials, 2020
Transition metal sulfides hold promising potentials as Li‐free conversion‐type cathode materials for high energy density lithium metal batteries. However, the practical deployment of these materials is hampered by their poor rate capability and short ...
Ya-Wei Chen, Jianming Li, Z. Lei, Y. Huo, Lanlan Yang, Suyuan Zeng, Hong-He Ding, Yi Qin, Yu-Lin Jie, Fan-Yang Huang, Qi Li, Jun-Fa Zhu, R. Cao, Gen-Qiang Zhang, Shu-Hong Jiao, Dong-Sheng Xu   +15 more
semanticscholar   +1 more source

O3-type NaNi0.5Mn0.5O2 hollow microbars with exposed {0 1 0} facets as high performance cathode materials for sodium-ion batteries

, 2020
O3-type layered transition metal oxides have been considered as the promising cathode candidates for sodium-ion batteries (SIBs) due to its high theoretical capacity.
Q. Mao, Rui Gao, Qing-Yuan Li, De Ning, Dong Zhou, G. Schuck, G. Schumacher, Yongmei Hao, Xiang-Feng Liu   +8 more
semanticscholar   +1 more source

Compact lanthanum hexaboride hollow cathode

Review of Scientific Instruments, 2010
A compact lanthanum hexaboride hollow cathode has been developed for space applications where size and mass are important and research and industrial applications where access for implementation might be limited. The cathode design features a refractory metal cathode tube that is easily manufactured, mechanically captured orifice and end plates to ...
Dan M, Goebel, Ronald M, Watkins
openaire   +2 more sources

Rational design of MoS2 nanosheets decorated on mesoporous hollow carbon spheres as a dual-functional accelerator in sulfur cathode for advanced pouch-type Li–S batteries

, 2020
Developing sulfur cathodes with high catalytic activity on accelerating the sluggish redox kinetics of lithium polysulfides (LiPSs) and unveiling their mechanisms are pivotal for advanced lithium–sulfur (Li–S) batteries.
Qin-Jun Shao, Peng-Fei Lu, Lei Xu, Decai Guo, Jing Gao, Zhong-Shuai Wu, Jian Chen   +6 more
semanticscholar   +1 more source