Micro Li-ion capacitor with activated carbon/graphite configuration for energy storage

Hierarchical 3-dimensional CoMoO4 nanoflakes on a macroporous electrically conductive network with superior electrochemical performance

“…6(d) and total CoMoO 4 mass loading of 7.6 mg, the specic capacity (area capacity) values of Sample-2.5 h are calculated to be 41.69, 39.88, 35.69, 32.40 and 26.40 mA h g À1 (633.7, 606.2, 542.5, 492.5 and 401.3 mA h cm À2 ) for discharging current densities of 0.15, 0.3, 0.5, 1 and 2 A g À1 , respectively. 24,25 The results obtained from Sample-2.5 h are much larger than those from the CoMoO 4 /MWCNT electrode (21.33 mA h g À1 at a discharge current density of 1 A g À1 ) described by Xu et al, 35 pure CoMoO 4 nanostructure (20.68 mA h g À1 at a discharge current of 1 A g À1 ) reported by N. Padmanathan et al, 16 and micro-Li-ion capacitor with an activated carbon/ graphite conguration for energy storage (180 mA h cm À2 at a discharge current of 0.5 mA cm À2 ) researched by Siwei Li et al 38 and comparable to those obtained from the hierarchical MnMoO 4 /CoMoO 4 heterostructured nanowires (51.99 mA h g À1 at a discharge current of 1 A g À1 ) prepared by Mai et al 6 The units are all unied scientically with respect of the original units used in the article given by the authors.…”

Graphene‐Based Materials for Lithium‐Ion Hybrid Supercapacitors

“…The negative electrodes are insertion‐type materials, including carbonaceous materials, layered oxides, spinel oxides, phosphates, fluorophosphates and silicates . The carbonaceous materials used for the cathode in hybrid supercapacitors include graphite, soft carbon, carbon nanotubes (CNTs), AC, carbon fibers, 3D porous carbon, etc. Other insertion‐type negative‐electrode materials for LiHSs include LTO and other crystal form of Ti oxides, spinel‐LiMn 2 O 4 and Ni‐doped spinel‐LiMn 2 O 4 , Li 2 CoPO 4 F, LiSn 2 (PO 4 ) 3 (LSP), and their composites with carbon or polymer, etc.…”

Arbitrary Shape Engineerable Spiral Micropseudocapacitors with Ultrahigh Energy and Power Densities

“…Microscale interdigital electrodes, with high areal and volumetric utilization of active materials, have been considered as an effective design to achieve the high‐performance MSCs . Electrical double‐layer microsupercapacitors (EDL‐MSCs), the first‐generation MSCs, were widely studied and fabricated in previous research . Two main approaches, namely, minimizing the electrode thickness to atomic levels and utilizing ultrahigh‐surface‐area carbon materials, were employed to improve the energy densities of EDL‐MSCs greatly .…”