Reticulated TiO₂-Modified Carbon Fiber Enabling as a Supercapacitor Electrode Material for Photoelectric Synergistic Charge Storage

Abstract

Photoassisted energy storage is a promising approach to realizing the utilization of solar power, and the reasonable design of a photoassisted supercapacitor with photosensitive materials is one of the efficient ways to realize solar power conversion and storage. Herein, we design a photoassisted supercapacitor electrode (TiO2/CF) by integrating a photoelectrode (TiO2) and a capacitive electrode (CF) together, which achieves photoelectric synergistic charge storage. It is found that spherical TiO2 precursors will crash, expand, integrate, stretch, and tear, forming a reticulated structure. Reticulated TiO2 guarantees illumination, which can boost the utilization of solar power. The TiO2/CF electrode exhibits a considerable (1.9-fold) increase in capacitance performance under light conditions as compared to dark conditions. Furthermore, this TiO2/CF photoassisted supercapacitor electrode exhibits an excellent cycle stability of about 99.19% after 5000 cycles. Moreover, the enhancement mechanism is elaborated as follows: these high-energy photoelectrons will participate in charge transfer to increase the total energy of the process, thereby enhancing capacitance performance. In addition, these photoelectron–hole pairs act as additional charge carriers to favor charge accumulation. This work may offer new prospects for developing photoassisted energy supply systems for the utilization of solar power.

Constructing Flower-Shaped NiCo2S4@CoAl-LDH Heterojunction Nanosheets Exhibits Extraordinary Electrochemical Behavior for a Light-Assisted Asymmetric Supercapacitor

“…Figure depicts the energy storage mechanism for the light-assisted NCS@CA//AC ASC device, wherein the working electrode generates photoelectrons and holes under light irradiation. , Electrons produced through photogeneration proceed toward the positive electrode, forming hole pairs that serve as effective charge carriers in redox reactions. These actions significantly enhance the interfacial reaction process. ,, Based on the foregoing analysis, this study constructed an ASC with photosensitive electrodes to attain elevated electrochemical performance via the synergistic effect of photoelectricity. Such a development heralds a new direction for innovation toward energy-storing technology.…”

“…These actions significantly enhance the interfacial reaction process. 7,19,67 Based on the foregoing analysis, this study constructed an ASC with photosensitive electrodes to attain elevated electrochemical performance via the synergistic effect of photoelectricity. Such a development heralds a new direction for innovation toward energy-storing technology.…”

Unexplored Orthorhombic LiMn1–xTixO2 Cathode Materials with a Stable Atomic Site Occupancy and Phase Transition

“…Therefore, cation substitution (high binding energy with oxygen) and surface modification with functional materials (prevention of oxygen loss) can be proposed as promising strategies. , Above all, this study is the first to precisely analyze the change in the phase ratio between o -LiMnO 2 and secondary phases during cycling, despite the complexity of crystallographic characterizations including oxygen deficiency and cation mixing. In this respect, stabilizing the phase transition behavior of o -LiMnO 2 during cycling through Ti incorporation is expected to open new avenues for next-generation Mn-rich cathode materials for rechargeable batteries and supercapacitors. , …”

“…In this respect, stabilizing the phase transition behavior of o-LiMnO 2 during cycling through Ti incorporation is expected to open new avenues for nextgeneration Mn-rich cathode materials for rechargeable batteries and supercapacitors. 69 S1); crystallographic information on o-LiMn 1−x Ti x O 2 (x = 0.05) (Table S2); and crystallographic information on o-LiMn 1−x Ti x O 2 (x = 0.1) (Table S3) (PDF)…”

Large Area Graphene–MXene Quantum Dot Based High Performance Photochargeable Supercapacitor

“…The capacitance enhancement under UV illumination is comparable and even highest among other carbon-based supercapacitors, e.g., mixed bismuth−iron oxide (Bi 2 O 3 −Fe 3 O 4 )/graphene composite-based supercapacitor (UV light, 39.3%), 31 carbon dot-modified mesoporous carbon-based supercapacitor (visible light, 54.4%), 32 bacteriorhodopsin/polyaniline hybrid bionanofilm-based supercapacitor (550 nm, 37.2%), 33 carbon dot-modified Ti 3 C 2 T X -based fibrous-based supercapacitor (400−800 nm, 35.9%), 34 carbon dot-decorated single-walled carbon nanotube/zinc oxide (ZnO) nanocomposite-based supercapacitor (UV light, 41.4%), 35 flake-like stannous sulfide (SnS)-anchored nickel foam-covered carbon layer-based supercapacitor (visible light, 85.8%), 36 nitrogen-doped carbon dots and zinc oxide conglomerated electrode-based supercapacitor (UV light, 58.9%), 37 and reticulated titanium dioxide (TiO 2 )-modified carbon fiber-based supercapacitor (white light, 90%). 38 Therefore, the MXene QD/graphene/FTO electrode based device presents a stable and efficient photoinduced photochargeable symmetrical supercapacitor with excellent capacitance enhancement under UV illumination.…”