Electrode Protection and Electrolyte Optimization via Surface Modification Strategy for High‐Performance Lithium Batteries

Abstract

Lithium batteries have become one of the best choices for energy storage due to their long lifespan, high operating voltage‐platform and energy density without any memory effect. However, the ever‐increased demands of high‐performance lithium batteries indeed place a stricter request to the electrodes and electrolytes materials, and electrode‐electrolyte interface. Various strategies are developed to enhance the overall performances of current lithium batteries, and among them, artificial modification of battery components is regarded as one of the most effective. However, systematic summery surrounding surface modifications is rare. In this review, the structural instability of the bare electrodes and the main defects of unmodified separator/solid electrolytes are briefly presented. Then diverse and advanced surface‐engineering strategies for both the cathode and anode materials, as well as the separator/solid electrolytes are carefully summarized. More importantly, the prospects of surface modification and challenges of current methods for constructing high‐performance lithium batteries are pointed out.

Excited State Regulated Emission in Hybrid Indium Halides via Crystal Structure Switch

“…The PLQY of Sb 3+ :PA 6 InCl 9 and Sb 3+ :PA 4 NaInCl 8 can reach 61 and 70%, respectively (Figure S10). With further increasing Sb 3+ doping concentration, the PL intensity decreases, which is due to the concentration quenching effect and the ET between Sb 3+ ions to the quenching centers such as surface defects or lattices. , It is worth noting that the addition of Na ions can slightly increase the luminescence intensity of PA 4 NaInCl 8 . Subsequently, the PL decay lifetime was measured at room temperature (RT).…”

Functionalized polypropylene separator coated with polyether/polyester blend for high-performance lithium metal batteries

“…Lithium metal as an anode has a high specific energy density of 3,860 mAh g -1 and a low anode potential of -3.04 V (vs. standard hydrogen electrode), causing lithium metal batteries (LMBs) to have great potential to meet the high energy density demand of energy storage field [1][2][3][4] . However, the high reactivity and conversion chemistry of lithium anode have resulted in the cycling instabilities and safety concerns of LMBs [5][6][7] .…”

Facile Fabrication of Polymer Electrolytes with Branched Structure via Deep Eutectic Electrolyte-Enabled In Situ Polymerizations

“…Under the premise of global energy conservation and emission reduction, lithium batteries have greatly developed in the past decades because of their high energy density and long-term life. − In order to meet the demand of higher energy density, lithium metal anode is considered to be the “holy grail” of lithium batteries because of its high theoretical capacity (3860 mAh g –1 ) and extremely low potential (−3.04 V vs SHE), − and the corresponding lithium metal batteries (LMBs) have become a promising vessel for next-generation energy storage. − However, the inherent disadvantages of the organic carbonate-based liquid electrolytes (LEs) used in traditional LMBs, such as volatility and flammability, are easy to cause safety hazards. − Compared with the LEs, polymer electrolytes are flexible and nonvolatile, which can effectively solve the safety concerns of LMBs. − However, the low ionic conductivity of PEs limits their commercial application in energy storage devices. − In addition, the constant growth of lithium dendrites on the lithium–metal surface and the unstable interfacial stability significantly affect the electrochemical properties and shorten the lifespan of LMBs. − …”