近日，课题组硕士生张景瑞论文“Novel Inorganic–Organic Hybrid Cathode for Aqueous Zinc-Ion Batteries: V₂O₅ Pillared with Diethylenetriamine like a Double-Stud”被ACS Sustainable Chemistry Engineering.（2021年中科院SCI期刊二区TOP期刊，IF=8.198）接收！

Abstract

Zinc-ion batteries (ZIBs) are promising for advanced energy storage. However, poor stability of cathode materials, such as V₂O₅, is a stumbling block in the commercialization of aqueous ZIBs. Here, we develop a novel inorganic–organic cathode of a V₂O₅-diethylenetriamine (DETA) ultrathin nanosheet via a simple hydrothermal method. DETA as a structure-directing agent pillars between the V₂O₅ layers. Combined with the first-principles calculation, the orientation and bonding type of DETA inside the V₂O₅ host structures are confirmed. Double hydrogen bonds at the two amino end groups provide the stable anchoring of DETA similar to that in a double-stud. The unique structure of the V₂O₅-DETA hybrid with an expanded interlayer spacing (0.95 nm) and a narrower band gap (0.72 eV) accelerates the electron transportation. It affords a high storage capacity of 235 mA h g^–1 at 0.1 A g^–1 and remains stable for over 1000 cycles at 4 A g^–1. DETA contributes to the promotion of the electrochemical kinetics and weakens the electrostatic interactions. This study employing multifunctional pillars may provide more applicable approaches for improving the structural stability during the intercalation exfoliation of energy storage materials.

https://pubs.acs.org/doi/full/10.1021/acssuschemeng.2c01975