High-voltage positive electrode materials for lithium-ion batteries

TL;DR: An outlook on lithium ion technology is presented by providing first the current status and then the progress and challenges with the ongoing approaches, and finally points out practically viable near-term strategies.

TL;DR: Tarascon and Assat as mentioned in this paper discuss the underlying science that triggers a reversible and stable anionic redox activity and highlight its practical limitations and outline possible approaches for improving such materials and designing new ones.

TL;DR: An overview of the energy storage devices from conventional capacitors to supercapacitors to hybrid systems and ultimately to batteries is provided, although the focus is kept on capacitive and hybrid energy storage systems.

Abstract: Secondary batteries based on metal anodes (e.g., Li, Na, Mg, Zn, and Al) are among the most sought‐after candidates for next‐generation mobile and stationary storage systems because they are able to store a larger amount of energy per unit mass or volume. However, unstable electrodeposition and uncontrolled interfacial reactions occuring in liquid electrolytes cause unsatisfying cell performance and potential safety concerns for the commercial application of these metal anodes. Solid‐state electrolytes (SSEs) having a higher modulus are considered capable of inhibiting difficulties associated with the anodes and may enable building of safe all‐solid‐state metal batteries, yet several challenges, such as insufficient room‐temperature ionic conductivity and poor interfacial stability between the electrode and the electrolyte, hinder the large‐scale development of such batteries. Here, research and development of SSEs including inorganic ceramics, organic solid polymers, and organic–inorganic hybrid/composite materials for metal‐based batteries are reviewed. The comparison of different types of electrolytes is discussed in detail, in the context of electrochemical energy storage applications. Then, the focus of this study is on recent advances in a range of attractive and innovative battery chemistries and technologies that are enabled by SSEs. Finally, the challenges and future perspectives are outlined to foresee the development of SSEs.

TL;DR: In this paper, the effect of traditional solid electrolyte interphase (SEI) forming additives of vinylene carbonate (VC), fluoroethylene carbonates (FEC), and ethylene sulfite (ES) with respect to their impact on the formation and growth of the CEI layer was investigated.

TL;DR: In this article, the authors attributed the porosity loss to a deposit, which precipitated onto the separator surface from the electrolyte and clogged separator pores, which resulted from a homogenous decomposition process of the LiPF 6 -ethylene carbonate-ethyl-methyl carbonate electrolyte, which was significantly accelerated at elevated temperatures.

TL;DR: These findings reveal that defect sites, even in dilute concentrations, can have a profound effect on the overall electrochemical behavior.