Research progress of materials and devices for room-temperature Na-ion batteries

Abstract

Among various electrochemical energy storage technologies, room-temperature Na-ion batteries (NIBs) are regarded as ideal candidates in large-scale energy storage field due to advantages of abundant resources and low material cost in addition to their characteristics of high energy density and long cycle life. Since 2011, the Institute of Physics, Chinese Academy of Sciences (IOP-Chinese Academy of Sciences) has devoted to developing the cost-effective and environmental-safe NIBs, and attained many original achievements in the research of cathode, anode and electrolyte materials, and also developed Na-ion pouch cells with capacities of 1 Ah. For instance, the highly reversible Cu2+/Cu3+ redox was discovered for the first time and the low cost Na-Cu-Fe-Mn-O layered oxide cathodes have been designed accordingly; the anthracite-derived carbon anodes have been exploited via a simple one-step carbonization process with a high performance-to-price ratio; a new type of NaFSI sodium salt was first used in the non-aqueous carbonate electrolyte to significantly improve the performance of electrode materials, etc. This review summarizes the important progress and breakthroughs achieved in IOP-Chinese Academy of Sciences for materials and devices of NIBs. We hope that these contributions conduce to realizing the industrialization of NIBs.

Recent Advances for High‐Entropy based Layered Cathodes for Sodium Ion Batteries

“…In addition, what is not desired in the layered cathode material is the multiple phase transition of the structure during the charging and discharging process, which will make the reversibility of the material weakened. From the current reports, it seems that high entropy oxides can improve this situation by delaying [ 25,19 ] or suppressing the phase transition [ 26,27 ] to improve the reversibility of the structure and achieve a single phase transition during Na + removal/embedding.…”

“…When it is matched with the anode electrode to assemble the full battery, its effective specific capacity cannot be fully utilized, and pre‐sodiation is required. [ 27 ] The research based on high‐entropy layered oxides in SIBs is basically dominated by O3 or P2 phases. In this review, we briefly introduce the high‐entropy layered oxide cathodes recently published for SIBs.…”

O3‐Type Cathodes for Sodium‐Ion Batteries: Recent Advancements and Future Perspectives

“… (a) Illustration of P2/O2 and O3/P3 structures [266] . (b) Crystal structure of O3 and O′3 phases [267] . (c) Comparison for the cationic potential of P2 and O3 type cathodes [268] …”

“…[123] As [266] (b) Crystal structure of O3 and O'3 phases. [267] (c) Comparison for the cationic potential of P2 and O3 type cathodes. [268] shown in Figure 4a, there is only a tiny irreversible capacity of 8 mAh.g À 1 in the first cycle at 1/20 C (12.5 mA.g À 1 ).…”

Application of First Principles Computations Based on Density Functional Theory (DFT) in Cathode Materials of Sodium-Ion Batteries

“…However, due to the excellent characteristics of LIBs and the limitations of research conditions, research on SIBs were developing slowly. In recent years, with the huge demand for renewable energy and the attentions paid to environmental pollution, the research on sodium-ion batteries has returned to people's attention [1][2][3][4][5][6][7][8][9]. Additionally, because it can alleviate the resource shortage caused by excessive exploitation of LIB raw materials and the limited development of energy storage batteries caused by rising material prices, to a certain extent, it has attracted extensive attentions from researchers all over the world.…”