Shaping the future of hybrid ion capacitors
Vanchiappan Aravindan, Martin Oschatz, Konstantin Schutjajew and Marta Sevilla introduce this themed collection on hybrid ion capacitors.
Organic materials as charge hosts for pseudocapacitive energy storage
Organic materials employ earth-abundant elements as the basic constituents, which makes organic energy storage devices sustainable and cost-effective.
A perspective on the evolution and journey of different types of lithium-ion capacitors: mechanisms, energy-power balance, applicability, and commercialization
In this perspective article, we have systematically presented lithium-ion capacitors' (LICs') development starting from their inception. The motivation and chemistry behind the design of LICs and their route to commercialization are summarized.
Recent developments in zinc metal anodes, cathodes, and electrolytes for zinc-ion hybrid capacitors
This review presents a comprehensive summary of recent developments in zinc-ion hybrid capacitors with particular emphasis on several materials and design strategies developed for zinc metal anodes, cathodes, and electrolytes.
Paper
Study of the influence of the formation protocol on the SEI layer formed at the graphite electrode surface of a non-aqueous potassium-ion hybrid supercapacitor (KIC) through STEM and XPS analyses
A correlation between the evolution of the KF content in the SEI and the evolution of cycling performance of the non-aqueous potassium-ion hybrid supercapacitor (KIC).
Influence of structural modifications on the alkali ion storage properties of carbon black in hybrid ion capacitor negative electrodes
Structurally altered carbon blacks were investigated in hybrid ion capacitors. A diffusion limited storage in more graphitic structures is observed for Na. Li shows no diffusional hindrance and higher rate capability with graphite-like carbons.
Zinc-ion hybrid supercapacitor-batteries with a leaf-like ZIF-L/MgNiO2 micro-sphere composite and a Zn2+/sulfonated poly(ether ether ketone) gel
A long-lasting, low cost, eco-friendly, air-processable ZIF-L/MgNiO2//Zn2+/SPEEK//ZnμPs-AC based zinc-ion hybrid supercapacitor battery (ZHSB) with an optimal balance between high power density (0.8–8 kW kg−1) and high energy density (157–89 W h kg−1), a capacity of 197 mA h g−1 (at 1 A g−1) and an ultra-long cycle life of ∼10 000 cycles is presented.
Paper
Biomass-derived carbon sponges for use as sodium-ion capacitor electrodes
A high performance Na-ion capacitor has been assembled by using S-doped carbon sponges and highly porous carbon sponges produced from biomass-derived products by using sustainable salt-templating approaches.
Hydrogen bond regulating in hydrogel electrolytes for enhancing the antifreeze ability of a flexible zinc-ion hybrid supercapacitor
A polyvinyl alcohol/cellulose nanofibers/dimethyl sulfoxide hydrogel electrolyte with superior freezing tolerance was fabricated and applied in zinc-ion hybrid supercapacitors.
Upcycling of spent lithium-ion battery graphite anodes for a dual carbon lithium-ion capacitor
A dual carbon lithium-ion capacitor is designed combining sustainable electrode materials using mechanistically different carbon composites derived from spent lithium-ion battery anodes.
Enhanced activated carbon lithium-ion capacitor electrochemical stability through electrolyte dielectric optimisation
Our results demonstrate that high electrolyte dielectric enhances activated carbon lithium-ion capacitor stability. The enhanced stability is due to improved PF6 anion protection and delayed electrolyte decomposition on the AC cathode.
Paper
A high-energy hybrid lithium-ion capacitor enabled by a mixed capacitive-battery storage LiFePO4 – AC cathode and a SnP2O7 – rGO anode
In this work we present the development and optimization of a graphene-embedded Sn-based material and an activated carbon/lithium iron phosphate composite for a high-performing hybrid lithium-ion capacitor (LIC).
Pre-lithiated Li4+xTi5O12 (0 ≤ x ≤ 3) anodes towards building high-performance Li-ion capacitors
A 180° faradaic shift is observed for a completely pre-lithiated Li4Ti5O12 anode when paired with an activated carbon cathode. The optimum range of pre-lithiation certainly enables attaining high energy and high power Li-ion capacitors.
About this collection
Hybrid ion capacitors are considered a promising next-generation charge-storage device owing to their combined features of both rechargeable batteries and supercapacitors, i.e., high energy and high-power capability. These devices stand out by their tunable performance characteristics and a broad range of possibly applicable materials.
Guest edited by Marta Sevilla (Instituto Nacional del Carbón - CSIC, Spain, ORCiD: https://orcid.org/0000-0002-2471-2403), Vanchiappan Aravindan (Indian Institute of Science Education and Research (IISER) Tirupati, India, ORCiD: https://orcid.org/0000-0003-1357-7717), Martin Oschatz (Friedrich-Schiller-Universität Jena, Germany, ORCiD: https://orcid.org/0000-0003-2377-1214) and Konstantin Schutjajew (Friedrich-Schiller-Universität Jena, Germany, ORCiD: https://orcid.org/0000-0003-0630-8201), Sustainable Energy & Fuels is proud to showcase the latest developments towards hybrid ion capacitors in this collection.