One-Step Synthesis of Ni/Ni(OH)2@Multiwalled Carbon Nanotube Coaxial Nanocable Film For High Performance Supercapacitors

Strongly coupled graphene/Mn 3 O 4 composite with enhanced electrochemical performance for supercapacitor electrode

“…However, EDLCs are plagued by their relatively low energy density, and their capacitance are typically in the range of 75−175 F g −1 due to the restriction of the specific surface area and the pore-size distribution [2]. In contrast, pseudocapacitors can offer far higher specific capacitance and energy density [5]. At present, the pseudocapacitors electrode materials generally involve various metal oxides [9][10][11], metal hydroxides [12,13], metal sulphides [7,14] and conductive polymers [12,14].…”

“…In recent years, SCs have attracted intensive research attention in view of their prominent advantages of fast charging-discharging, long cycling life and convenient operation over a wide temperature range [2,3]. As a consequence, SCs have been widely applied in hybrid electric vehicles (HEVs), backup power and other energy storage devices which require a quick and high power output in a short time [4,5]. Based on the different charge storage mechanisms, SCs can be categorized into two types: (i) electrical double-layer capacitors (EDLCs) and (ii) pseudocapacitors [2,6].…”

Porous micro-spherical LiFePO4/CNT nanocomposite for high-performance Li-ion battery cathode material

“…35,36 In the typical synthesis of LFP/CNT nanocomposite, 0.3 g of the as- 20 prepared CNTs was first dispersed in 400 ml purified water and stirring for 10 min. Then, 0.1 mol Fe(NO 3 ) 3 ·9H 2 O (≥ 99.5%, Aladdin) was dissolved in the CNT solution with ultrasonic treatment for 10 min.…”

Facile one-pot method synthesis CNT–GeO2 nanocomposite for high performance Li ion battery anode material

“…28,29 In a typical synthesis of the CNT-GeO 2 nanocomposite, 40 ml GeCl 4 solution (0.05 M) was first mixed with 80 mg of the as-prepared CNTs and the mixture was heated in an oil bath to 110 1C under stirring. 28,29 In a typical synthesis of the CNT-GeO 2 nanocomposite, 40 ml GeCl 4 solution (0.05 M) was first mixed with 80 mg of the as-prepared CNTs and the mixture was heated in an oil bath to 110 1C under stirring.…”

“…For the purpose of improving the energy density of LIBs, scientists have made great efforts to explore alternative anode materials with higher capacity. 28,29 Although CNTs have successfully improved the Li storage performance of many electrode materials, GeO 2 has not been the focus of much research. Among these, Ge has emerged as an attractive anode for Li ion batteries due to its many fascinating properties, such as high capacity, a low working potential of about 0 to 0.4 V vs. Li, and high Li diffusivity at room temperature (400 times higher than the well-studied Si).…”