Building better dual-ion batteries
- PDF / 399,133 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 89 Downloads / 187 Views
PERSPECTIVE Building better dual-ion batteries
Kostiantyn V. Kravchyk and Maksym V. Kovalenko, Laboratory for Thin Films and Photovoltaics, Empa – Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf CH-8600, Switzerland; Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich CH-8093, Switzerland Address all correspondence to Kostiantyn V. Kravchyk at kravchyk@inorg. chem.ethz.ch and Maksym V. Kovalenko at [email protected] (Received 17 August 2020; accepted 30 September 2020)
ABSTRACT This perspective article summarizes the operational principles of dual-ion batteries and highlights the main issues in the interpretation and reporting of their electrochemical performance. Secondary dual-ion batteries (DIBs) are emerging stationary energy storage systems that have been actively explored in view of their low cost, high energy efficiency, power density, and long cycling life. Nevertheless, a critical assessment of the literature in this field points to numerous inaccuracies and inconsistencies in reported performance, primarily caused by the exclusion of the capacity of used electrolytes and the use of non-charge-balanced batteries. Ultimately, these omissions have a direct impact on the assessment of the energy and power density of DIBs. Aiming to secure further advancement of DIBs, in this work, we critically review current research pursuits and summarize the operational mechanisms of such batteries. The particular focus of this perspective is put on highlighting the main issues in the interpretation and reporting of the electrochemical performance of DIBs. To this end, we survey the prospects of these stationary storage systems, emphasizing the practical hurdles that remain to be addressed. Keywords: cost/cost-effective; energy storage; storage
Introduction At present, one of the primary global technological challenges is the replacement of fossil fuels by renewable energy sources. From this perspective, stationary batteries are considered as a compelling solution for mitigating the energy production–consumption mismatch generated by the intermittency of renewables such as wind and solar power.1,2 Among the massive diversity of battery technologies, dual-ion batteries (DIBs) have particularly emerged as compelling electrochemical energy storage systems due to their low cost, high power density, and cyclic stability.3–5
Although the number of publications reporting diverse DIBs has increased significantly in recent years, the detailed analysis of the literature in this field reveals severe issues associated with improper reporting of their energy and power densities. The majority of publications on DIBs focus exclusively on the specific charge storage capacity of individual electrodes without a realistic assessment of energy and power density limits or reporting their incorrect values due to the exclusion of electrolytes from energy density calculations and testing of charge-imbalanced DIBs. To raise awa
Data Loading...
