Abstract In lithium metal batteries, electrolytes containing a high concentration of salts have demonstrated promising cyclability, but their practicality with respect to the cost materials is yet be proved. Here we report fluorinated aromatic compound, namely 1,2‐difluorobenzene, for use as diluent solvent in electrolyte realize “high‐concentration effect”. The low energy level lowest unoccupied molecular orbital (LUMO), weak binding affinity ions, and fluorine‐donating power...

Fast ion transport is essential for high rate capability in rechargeable battery operation. Recently, an ultrafast aluminum-ion was experimentally demonstrated through the reversible intercalation/deintercalation of chloroaluminate anions (AlCl4–) graphitic-foam cathodes. Using first-principles calculations, herein, we report that unique structural characteristic graphitic foam, i.e., mechanical flexibility few-layered graphene nanomaterials, plays a key role battery. We found AlCl4– stored...

Abstract Lithium metal anodes are steadily gaining more attention, as their superior specific capacities and low redox voltage can significantly increase the energy density of rechargeable batteries far beyond those current Li‐ion batteries. Nonetheless, relevant technology is still in a premature research stage mainly due to uncontrolled growth Li dendrites that ceaselessly cause unwanted side reactions with electrolyte. In order circumvent this shortcoming, herein, an ionic liquid...

Abstract Contrary to early motivation, the majority of aluminium ion batteries developed date do not utilise multivalent storage; rather, these rely on monovalent complex ions for their main redox reaction. This limitation is somewhat frustrating because innate advantages metallic such as its low cost and high air stability cannot be fully taken advantage of. Here, we report a tetradiketone macrocycle an battery cathode material that reversibly reacts with divalent (AlCl 2+ ) consequently...

1,2-Dimethoxyethane (DME) has been widely used as an electrolyte solvent for lithium metal batteries on account of its intrinsic reductive stability; however, low oxidative stability presents a major challenge use in high-voltage Li (LMBs). In this direction, herein, we introduce new low-dielectric solvent, 1,2-dimethoxypropane (DMP), solvent. Compared to DME, DMP decreased solvation power owing increased steric effects, thus promoting anion–Li+ interactions. This controlled structure the 2...

Abstract Nonaqueous carbonate electrolytes are commonly used in commercial lithium‐ion battery (LIB). However, the sluggish Li + diffusivity and high interfacial charge transfer resistance at low temperature (LT) limit their wide adoption among geographical areas with latitudes altitudes. Herein, a rational design of new is demonstrated, which can significantly improve performance below −20 °C. This electrolyte achieved by tailoring chemical structure, i.e., altering fluorination position...

Fluorides have been identified as a key ingredient in interphases supporting aggressive battery chemistries. While the precursor for these fluorides must be pre-stored electrolyte components and only delivered at extreme potentials, chemical source of fluorine so far has confined to either negatively-charge anions or fluorinated molecules, whose presence inner-Helmholtz layer electrodes, consequently their contribution interphasial chemistry, is restricted. To pre-store on positive-charged...

Abstract The state-of-the-art all-solid-state batteries have emerged as an alternative to the traditional flammable lithium-ion batteries, offering higher energy density and safety. Nevertheless, insufficient intimate contact at electrode-electrolyte surface limits their stability electrochemical performance, hindering commercialization of batteries. Herein, we conduct a systematic investigation into effects shear force in dry electrode process by comparing binder-free hand-mixed pellets,...

Most of the existing flexible lithium ion batteries (LIBs) adopt conventional cofacial cell configuration where anode, separator, and cathode are sequentially stacked so have difficulty in integration with emerging thin LIB applications, such as smart cards medical patches. In order to overcome this shortcoming, herein, we report a coplanar structure which anodes cathodes interdigitatedly positioned on same plane. The electrode design brings advantages enhanced bending tolerance capability...

Despite their unparalleled theoretical capacity, lithium-metal anodes suffer from well-known indiscriminate dendrite growth and parasitic surface reactions. Conductive scaffolds with lithium uptake capacity are recently highlighted as promising hosts, carbon nanotubes (CNTs) an ideal candidate for this purpose because of capability percolating a conductive network. However, CNT networks prone to rupture easily due large tensile stress generated during uptake-release cycles. Herein,...

Abstract Aromatic organic compounds can be used as electrode materials in rechargeable batteries and are expected to advance the development of both anode cathode for sodium‐ion (SIBs). However, most aromatic assessed SIBs date exhibit significant degradation issues under fast‐charge/discharge conditions unsatisfying long‐term cycling performance. Now, a molecular design concept is presented improving stability battery electrodes. The investigated compound,...

Low-temperature electrolytes (LTEs) have been considered as one of the most challenging aspects for wide adoption lithium-ion batteries (LIBs) since SOA cannot sufficiently support redox reactions at LT resulting in dramatic performance degradation. Although many attempts taken by employing various noncarbonate solvent electrolytes, there was a lack fundamental understanding limiting factors low-temperature operations (e.g., -20 to -40 °C). In this paper, crucial role...

Silicon is seen as one of the most promising anode candidates for next-generation lithium-ion batteries, due to its high theoretical capacity and energy density. However, many technical barriers remain implementation, chemical/electrochemical reactivities with standard electrolytes incomplete passivation from large volume changes. Herein, we report an isosorbide dimethyl ether (IDE) based electrolyte, which exhibits greatly improved stability, evidenced by long cycle life calendar life. An...

A variety of electrolyte engineering strategies have been introduced to extend the cycle life lithium metal batteries (LMBs). These can be largely grouped into two categories: those that induce a solvent-driven vs an anion-driven solid interphase (SEI) layer. Although each strategy has proven effective for SEI manipulation, they are not yet comprehensively understood. Here, salts with different dissociation abilities systematically screened. Among screened, highly dissociative...

Abstract Due to unparalleled theoretical capacity and operation voltage, metallic Li is considered as the most attractive candidate for lithium‐ion battery anodes. However, metal electrodes suffer from uncontrolled dendrite growth consequent interfacial instability, which result in an unacceptable level of performance cycling stability safety. Herein, it reported that a marginal amount (1.5 at%) magnesium (Mg) doping alters surface properties foil drastically such way upon plating, highly...

A sodium polyacrylate (NaPAA) binder induces the formation of a stable and Na-ion conductive NaPO2F2-rich cathode–electrolyte interphase layer via displacement reaction.

Abstract Lithium metal has been hailed as a key enabler of upcoming rechargeable batteries with high energy densities. Nonetheless, uncontrolled dendritic growth and resulting formation nonuniform solid‐electrolyte‐interphase (SEI) layer constitute an ever‐challenging obstacle in long‐term cyclability safety. So far, these drawbacks have addressed mainly by using noncarbonate electrolytes based on their relatively mild decomposition under reductive environments. Here, toluene co‐solvent...

Abstract Due to the exceptional theoretical energy density and low cost of elemental sulfur, lithium–sulfur (Li–S) batteries are spotlighted as promising post‐lithium‐ion batteries. Despite these advantages, performance Li–S would need be improved further for their wide dissemination in practical applications. Here, cobalt(II)‐centered fluorinated phthalocyanine, namely, F‐Co(II)Pc, is reported a multi‐functional component sulfur cathodes with following benefits: 1) enhanced conversion...

Sulfated-zirconia superacid enhances the performance of lithium-metal battery markedly by increasing lithium-ion transference number and modifying interfacial composition.

Abstract Despite the attractive theoretical capacity of sulfur over 1600 mA h g −1 , lithium–sulfur (Li–S) batteries suffer from insufficient cycle lives mainly due to fatal polysulfide dissolution. This chronic drawback becomes amplified at high areal capacities, especially close commercial levels (i.e., >3 cm −2 ). Here, we introduce an integrated approach adopting poreless urea–urethane copolymer (spandex) separator and cesium nitrate (CsNO 3 ) electrolyte additive. The spandex...