Surface heterogeneity in Li0.5CoO2 within a porous composite electrode

2018 ◽  
Vol 54 (60) ◽  
pp. 8320-8323 ◽  
Author(s):  
Mi Lu ◽  
Yongzhi Mao ◽  
Jian Wang ◽  
Yongfeng Hu ◽  
Jigang Zhou
Keyword(s):  
Composite Electrode ◽  
Surface Heterogeneity ◽  
Surface Phase ◽  
Porous Composite ◽  
Phase Heterogeneity

Surface phase heterogeneity mapping of the same LCO particles in a charged composite electrode deciphers the interactions among the electrode components.

scholarly journals α(β)-PbO2 doped with Co3O4 and CNT porous composite materials with enhanced electrocatalytic activity for zinc electrowinning

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1351-1360
Author(s):  
Xuanbing Wang ◽  
Ruidong Xu ◽  
Suyang Feng ◽  
Bohao Yu ◽  
Buming Chen
Keyword(s):  
Composite Materials ◽  
Electrocatalytic Activity ◽  
Composite Electrode ◽  
Zinc Electrowinning ◽  
Porous Composite

3D-Ti/PbO2–Co3O4–CNTs composite electrode was fabricated through galvanostatic electrodepositon, which shows outstanding electrocatalytic activity to OER in harsh media (50 g L−1 Zn2+ + 150 g L−1 H2SO4).

scholarly journals Porous MnO2/ carbon Hybrid Material with Improved Electrochemical Performance

2021 ◽  
Vol 59 (9) ◽  
pp. 670-676
Author(s):  
Venugopal Nulu
Keyword(s):  
Carbon Source ◽  
Surface Area ◽  
Composite Electrode ◽  
High Surface ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Porous Composite ◽  
Lithium Storage ◽  
Mno2 Nanoparticles

In this work, MnO2 nanoparticles were embedded in a carbon matrix as a porous composite, fabricated using a simple chemical route followed by low-temperature annealing, with activated carbon (AC) as the carbon source in the composite preparation. The porous MnO2/carbon structures contained some selective nanoparticles coated with carbon. The structural feature was identified by transmission electron microscopy (TEM). The surface area and pore size distribution of the materials were investigated by N2 adsorption/desorption isotherms, and demonstrated a high surface area of about 80 m2 g-1. AC is a readily available carbon source that can easily form a composite with MnO2 nanoparticles, forming a distinctive porous morphology. When employed as an anode material for lithium-ion batteries (LIB), the composite electrode demonstrated high specific capacities with an initial discharge capacity of 2500 mAh g-1 and maintained about 1391 mAh g-1 after fifty cycles. It also demonstrated excellent high rate performance, delivering more than 500 mAh g-1 of specific capacity at 3000 mA g-1, which is a higher capacity than a conventional graphite anode. Overall, the MnO2/ carbon composite electrode delivered superior anode performance, which was attributed to the improved surface area of the carbon hybridized MnO2 nanoparticles. The porous composite has benefits for lithium storage performance.

Ionic liquid directed assembly of wrinkled and porous composite electrode for high-power flexible supercapacitors

RSC Advances ◽  
2014 ◽  
Vol 4 (110) ◽  
pp. 65012-65020 ◽  
Author(s):  
Lirong Kong ◽  
Wei. Chen
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Porous Structure ◽  
High Power ◽  
High Performance ◽  
Composite Electrode ◽  
Directed Assembly ◽  
Porous Composite ◽  
Reduced Graphene

By using carbon nanotube/ionic liquid as surfactant-like agent, flexible reduced graphene oxide/polyaniline composite electrode membranes with wrinkled and porous structure were fabricated for high performance supercapacitors.

Unexpected phase separation in Li1−xNi0.5Mn1.5O4 within a porous composite electrode

2018 ◽  
Vol 54 (33) ◽  
pp. 4152-4155 ◽  
Author(s):  
Mi Lu ◽  
Jian Wang ◽  
Haitao Fang ◽  
Yongfeng Hu ◽  
Jigang Zhou
Keyword(s):  
Phase Separation ◽  
Oxidation State ◽  
Composite Electrode ◽  
Interface Structure ◽  
Porous Composite ◽  
X Ray ◽  
Ni Oxidation ◽  
Scanning Transmission

The Ni oxidation state in Li1−xNi0.5Mn1.5O4 within a composite electrode mapped by scanning transmission X-ray microscopy (STXM) has shown unexpected variations in phase separation among and within individual battery particles, which has been experimentally correlated to both their morphology and interface structure.

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