Inorganic Colloidal Electrolyte for Highly Robust Zinc-Ion Batteries

Abstract

Zinc-ion batteries (ZIBs) is a promising electrical energy storage candidate due to its eco-friendliness, low cost, and intrinsic safety, but on the cathode the element dissolution and the formation of irreversible products, and on the anode the growth of dendrite as well as irreversible products hinder its practical application. Herein, we propose a new type of the inorganic highly concentrated colloidal electrolytes (HCCE) for ZIBs promoting simultaneous robust protection of both cathode/anode leading to an effective suppression of element dissolution, dendrite, and irreversible products growth. The new HCCE has high Zn2+ ion transference number (0.64) endowed by the limitation of SO42−, the competitive ion conductivity (1.1 × 10–2 S cm−1) and Zn2+ ion diffusion enabled by the uniform pore distribution (3.6 nm) and the limited free water. The Zn/HCCE/α-MnO2 cells exhibit high durability under both high and low current densities, which is almost 100% capacity retention at 200 mA g−1 after 400 cycles (290 mAh g−1) and 89% capacity retention under 500 mA g−1 after 1000 cycles (212 mAh g−1). Considering material sustainability and batteries’ high performances, the colloidal electrolyte may provide a feasible substitute beyond the liquid and all-solid-state electrolyte of ZIBs.

Emerging of Heterostructure Materials in Energy Storage: A Review

“…[ 293–295 ] However, the reversible capacity and cycling stability of the state‐of‐the‐art ZIBs are quite inferior compared with LIBs, and the researches of heterostructures still remain in a primary stage, but the current results are really inspiring. [ 296,297 ] Xu et al. [ 298 ] reported a MoO 2 /Mo 2 N heterostructure cathode via an electrochemical activation process.…”

Bipolar Organic Polymer for High Performance Symmetric Aqueous Proton Battery

“…[1][2][3] So far, most attention still has been focused on aqueous metal-ion batteries (AMIBs), including monovalent ions (Li + , Na + , and K + ) and multivalent ions (Mg 2+ , Ca 2+ , Zn 2+ , and Al 3+ ). [4][5][6][7][8][9][10] While they commonly suffered from unsatisfactory electrochemical performance on account of large volume of metal ions and strong electrostatic interaction. Relatively little consideration has been paid for aqueous proton (H + ) batteries (APBs).…”

Sandwich Structure of 3D Porous Carbon and Water‐Pillared V2O5 Nanosheets for Superior Zinc‐Ion Storage Properties

“…Therefore, the research and exploration of cathode materials for RAZIBs have attracted the attention of researchers. [10,11] Recently, various cathode materials for RAZIBs, including manganese oxides, [12,[14][15][16] vanadium oxides, [7,17,11,8] Prussian blue and its analogues, cobalt-based materials, [19,20] molybdenum-based materials [21] and some organic materials [22] have been widely studied. Among them, vanadium oxides has attracted wide attention due to its higher theoretical capacity (589 mAh g À 1 ), multivalent states, low cost and abundant reserves.…”

“…Suitable positive electrode materials have a great impact on the electrochemical performance of the RAZIBs. Therefore, the research and exploration of cathode materials for RAZIBs have attracted the attention of researchers [10,11] …”