Recent advances in highly integrated energy conversion and storage system

Abstract

The vigorous development in the field of energy conversion and storage devices directly contributes to the full utilization and convenient use of clean energy. However, some drawbacks of independent energy conversion and storage devices, including unstable, insufficient energy output and dependence on external power supply, are difficult to overcome by self‐optimization, thus, hindering their further development and direct application. Coincidentally, the combination of above two devices can solve these problems, which conforms to their intrinsic needs for development. At the same time, the pursuit of portability and miniaturization also promotes the development of the power system toward a highly integrated direction. Therefore, we introduce several integration modes of energy conversion and storage systems, with emphasis on all‐in‐one power system, possessing the highest integration in this review. From the aspect of device configuration, working mechanisms and their performances, the all‐in‐one power systems based on different energy sources (e.g., mechanical, solar, thermal, and chemical energy) are discussed and analyzed. Finally, the design strategies are summarized and the potential development directions in the future are proposed. This review aims to provide a comprehensive overview of highly integrated energy conversion and storage system, and seeks to point out the opportunities and orientations of future research in this field.

Highly Reversible Zn Metal Anodes Enabled by Freestanding, Lightweight, and Zincophilic MXene/Nanoporous Oxide Heterostructure Engineered Separator for Flexible Zn-MnO2 Batteries

“…The reaction kinetics of the full cell with modified separator is probed by GITT technique to estimate D k during dynamic process. The coefficients D k are calculated by Fick’s second law: ,, where τ is current pulse time, M B , V M , and m B are the molecular mass, molar volume, and weight, and S is surficial area of active materials . The calculated D k is high and stable, indicating the superior rate performance and stable electrode structure (Figure a,b).…”

The Relationship between Initial Coulombic Efficiency and Transition Metal Ion Redox in P2-Na0.85[Cu0.1FexMn1–x]O2 Cathodes

“…The research about low-cost cathode materials for sodium ion batteries (SIBs) has made great progress over the past 10 years, − in which several promising cathode materials are reported, including layered transition metal oxides, polyanionic compounds, − and Prussian blue analogues, etc . Among them, the layered transition metal oxides with the advantages of high specific capacity, simple synthesis method, and abundant element resources, attract attention from researchers .…”

An organic-halide perovskite-based photo-assisted Li-ion battery for photoelectrochemical storage

“…Recently, the combined utilization of renewable solar energy and electrochemical energy storage have attracted scientists' wide interest because of worsening environmental problems. 1 Currently, in addition to optimizing the configurations (e.g., from common photovoltaics connecting with external batteries to two-electrode devices) to improve solar energy conversion efficiency, [2][3][4] researchers have also made great efforts to realize the effective utilization of solar energy in the photo-assisted battery system by designing appropriately active electrode materials. 5,6 In previous work, the physical and/or chemical strategies adopted for integrating light-absorbing and storage materials were proven accessible for effective solar energy utilization.…”