High‐Performance Flexible Solid‐State Ni/Fe Battery Consisting of Metal Oxides Coated Carbon Cloth/Carbon Nanofiber Electrodes

Abstract

Li-ion batteries, which restrict their wide applications, especially for environments that require mechanical stability and extreme conditions. [8][9][10][11] Alternatively, fl exible supercapacitors, especially quasi-solid state ones, have received considerate attention recently. [12][13][14][15] Although some of the fl exible supercapacitors so far reported can provide high power density and long-term stability, the energy density is relatively low. [16][17][18][19] Thus great challenges still remain in developing the overall high-performance solid/quasi-solid-state fl exible electrochemical energy storage devices with both high energy density and high power density. [20][21][22][23][24] As a typical type of traditional aqueous rechargeable batteries, Ni/Fe battery has been studied for a long period of time, because of its relatively high safety, lowcost, and high energy density. [ 25,26 ] In general, it can provide better safety and lower cost as compared with Li-ion battery; its energy density is higher in contrast to that of common supercapacitors. However, the low power density and poor cycling ability have limited the wide application of Ni/Fe battery. [ 27 ] On the other hand, recent development of nanomaterials and nanotechnology has enabled advanced electrode materials that can greatly enhance the performance of Ni/Fe battery. For example, by proper synergizing of nanostructured active materials (FeO x , NiO, or Ni(OH) 2 ) with carbonaceous materials (such as graphene, carbon nanofi bers, and carbon nanotubes (CNTs)), the power density of Ni/Fe battery can be greatly enhanced. [ 28,29 ] In some of these previous studies, the active materials are controlled in powder forms, such that carbon black and polymer additives have been employed in electrodes, where heavy metal foils or foams are used as the current collectors. The gravimetric/volumetric capacity of the full cell is therefore limited and the cell can be hardly fl exible. Some other works have focused on fl exible electrode materials for Ni/Fe batteries, where the device is assembled using liquid electrolytes. [ 30,31 ] In addition to the overall electrochemical performance, it would be a plus to eliminate liquid electrolytes, such that the safety issue in connection with the potential leakage problem can be solved. In order to promote the application of Ni/Fe batteries as a class of energy storage components for fl exible electronics Aqueous Ni/Fe batteries have great potential as fl exible energy storage devices, owing to their low cost, low toxicity, high safety, and high energy density. However, the poor cycling stability has limited the widely expected application of Ni/Fe batteries, while the use of heavy metal substrates cannot meet the basic requirement for fl exible devices. In this work, a fl exible type of solid-state Ni/Fe batteries with high energy and power densities is rationally developed using needle-like Fe 3 O 4 and fl ake-like NiO directly grown on carbon cloth/carbon nanofi ber (CC-CF) matrix as the anode and cathode, respecti...

Stabilized Molybdenum Trioxide Nanowires as Novel Ultrahigh‐Capacity Cathode for Rechargeable Zinc Ion Battery

“…[45] Furthermore, a relatively Adv. 2019, 6,1900151 [16,45,46,51,52,55,57] b) Picture displays the LED lamps powered by quasisolid state Zn//MoO 3 batteries. 2019, 6,1900151 [16,45,46,51,52,55,57] b) Picture displays the LED lamps powered by quasisolid state Zn//MoO 3 batteries.…”

Macroscopic‐Scale Three‐Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

“…[139] Yu et al reported hierarchical core-shell-like MnO 2 nanostructures decorated MnO 2 hexagonal nanoplate arrays uniformly grown on carbon cloth fibers using a novel one-step electrochemical deposition method. [140] Later, V 2 O 5 nanoparticles encapsulated in 3D networked porous carbon matrix, [141] needle-like Fe 3 O 4 and flake-like NiO, [142] layered tungsten disulfide (WS 2 ) [143] and cubic phase CoSe 2 , [144] have been also grown on carbon cloth. Recently, ternary transition metal oxides/sulfides have attracted significant research interest, due to their widely promising www.advancedsciencenews.com application in many fields.…”

“…3D nitrogen-doped porous CNFs can be prepared using our CNF gel without adding any activation as the electrodes of supercapacitors, which exhibit hierarchical structure with reasonable distribution of mesopores and micropores. Compared to the carbon materials with single-sized pores, the [57][58][59][60][61][62][63][64]72] High surface areas; low volume density Thermal transformation approach CNF gels derived from thermal transformations of BC [16,70,85,86,[102][103][104][105][106][107][108][109][110][111][112][113] CVD technique 3D CNF/graphene networks [116] 3D CNF films Template-assisted approach Carbon cloth, carbon papers and carbon fiber felt-based 3D CNF films [128][129][130][131][132][133][134][135][136][137][139][140][141][142][143][144][145][146][147]…”

Synthesis of Carbon Nanotube Incorporated Metal Oxides for the Fabrication of Printable, Flexible Nickel‐Zinc Batteries

“…Flexible batteries based on textiles or carbon cloths as matrix where the active materials are loaded/doped onto the scaffold have also been fabricated. [6,16,17] …”

“…Promising materials include graphene, [22,35–37] CNTs, [26,38] carbon microfiber, [6,39] carbon black, [40] porous materials from plant, [41,42] and even organic conductive polymers. [43] Each material has its own benefits and limitations.…”