Aerosol‐Spray Pyrolysis toward Preparation of Nanostructured Materials for Batteries and Supercapacitors

Abstract

There is an ever‐increasing demand for energy storage combined with high energy density, long lifespan, and low cost. Design and fabrication of electrode materials with characteristics of scale and fast charge (electrons and ions) access to electrochemically active site are of great importance. The aerosol‐spray synthesis technique has shown considerable promise as an attractive, cost‐effective, and scalable route for material preparation. Particles with complex architectures and chemistry can be produced by simply using an economical, continuous, and rapid process. Here, recent advances of the industrially viable aerosol‐spray‐pyrolysis method are summarized with regard to structure design and processing of electrode materials in the field of energy storage. Beginning with an introduction to the principles, characteristics, and process parameters of aerosol‐spray methods, the focus then moves to recent achievements to date in experimental exploration of fabricating a variety of electrode materials for energy‐storage devices, including lithium‐ion batteries, sodium‐ion batteries, supercapacitors, and lithium–sulfur batteries. Also discussed are the current status, directions, and prospects for future exploration of material synthesis using aerosol‐spray techniques. Aerosol‐spray pyrolysis represents an important breakthrough in multidimensional structure design, and exhibits incredible versatility for material fabrication for high‐performance energy‐storage devices.

Direct Nano‐Synthesis Methods Notably Benefit Mg‐Battery Cathode Performance

“…While conversion cathodes traditionally suffer from rapid capacity fade, the direct preparation of nano‐composite electrodes has been previously demonstrated as a viable technique to significantly improve the performance of many materials. [ 64–67 ] Indeed, we show here that this is the case for CuCo 2 S 4 , a novel Mg cathode candidate.…”

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

“…To further evaluate the practicality of the as‐prepared N‐GQD@cZIF‐8/CNT all‐solid‐state supercapacitors in the actual situation, the flexibility test was carried out . Figure a illustrates the flexibility of the device based on N‐GQD@cZIF‐8/CNT through bend, fold, and twist tests.…”

Emerging Potassium‐ion Hybrid Capacitors

“…[115] The aerosol-spray technique has exhibited considerable promise as a simple, cost-effective, and scalable route for the synthesis of electrode material. [116,117] SÀ KTO@C composed of carbon-coated nanorods exhibits a 3D microsphere structure (Figure 17b). When used as anode material in KIB, the SÀ KTO@C shows enhanced K-ion insertion pseudo capacitor behavior, high reversible capacity of 155.1 mA g À 1 , good rate capability (20 A g À 1 ) and long cycling stability with 77.1 % capacity retention at 1 C for 1000 cycles (Figure 17c).…”

“…reported a carbon coating K 2 Ti 2 O 5 microspheres (S−KTO@C) through spray drying method followed by chemical vapor deposition for carbon coating (Figure 17a) [115] . The aerosol‐spray technique has exhibited considerable promise as a simple, cost‐effective, and scalable route for the synthesis of electrode material [116,117] . S−KTO@C composed of carbon‐coated nanorods exhibits a 3D microsphere structure (Figure 17b).…”