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With the advantages of high theoretical‐specific capacity and lowest working potential, lithium metal anode is considered as the most promising anode for next‐generation batteries. Here, a scalable dealloying method is developed to prepare nano‐sized bismuth (Bi). It is found that the Bi‐modification can not only enhance the wettability of the commercial polyethylene separator but also suppresses...
Lithium (Li) metal batteries (LMBs) face huge challenges to achieve long cycling life at wide temperature range owing to the severe dendrite growth at subambient temperature and the intense side reactions with electrolyte at high temperature. Herein, an ultrathin LiBO2 layer with an extremely high Young's modulus of 8.0 GPa is constructed on Li anode via an in situ reaction between Li metal and 4,4,5,5‐tetramethyl‐1,3,2‐dioxa‐borolane...
High‐voltage lithium metal batteries (LMBs) are a promising high‐energy‐density energy storage system. However, their practical implementations are impeded by short lifespan due to uncontrolled lithium dendrite growth, narrow electrochemical stability window, and safety concerns of liquid electrolytes. Here, a porous composite aerogel is reported as the gel electrolyte (GE) matrix, made of metal–organic...
Polymer‐based quasi‐solid‐state electrolyte (QSE) is an effective means to solve the safety problem of lithium (Li) metal batteries, and stable solid‐electrolyte‐interface (SEI) layers between electrolyte and anode/cathode are highly required for their long‐term stability. Herein, it is demonstrated that a silicon‐doped polyether functions as a multifunctional unit, which can induce the formation...
Li metal batteries (LMBs) are ideal candidates for future high‐energy‐density battery systems. To date, high‐voltage LMBs suffer severe limitations because of electrolytes unstable against Li anodes and high‐voltage cathodes. Although ether‐based electrolytes exhibit good stability with Li metal, compared to carbonate‐based electrolytes, they have been used only in ≤4.0 V LMBs because of their limited...
Lithium metal batteries with polyethylene oxide (PEO) electrolytes are considered as one of the ideal candidates for next generation power sources. However, the low ambient operation capability and conventional solvent‐based fabrication process of PEO limit their large‐scale application. In this work, a comb‐like quasi‐solid polymer electrolyte (QPE) reinforced with polyethylene glycol terephthalate...
Stable lithiophilic sites in 3D current collectors are the key to guiding the uniform Li deposition and thus suppressing the Li dendrite growth, but such sites created by the conventional surface decoration method are easy to be consumed along with cycling. In this work, carbon fiber (CF)‐based 3D porous networks with built‐in lithiophilic sites that are stable upon cycling are demonstrated. Such...
Rechargeable lithium metal batteries (LMBs) are deemed as a viable solution to improve the power and/or energy density of the contemporary lithium‐ion batteries (LIBs). However, poor Li‐ion diffusivity within high‐energy cathodes causes sluggish kinetics of the corresponding redox reactions particularly at high C‐rates, thereby largely impeding the performance of rechargeable LMBs. In this work, a...
Metal‐organic frameworks (MOFs) fillers are emerging for composite polymer electrolytes (CPEs). Enhancing Lewis acid–base interaction (LABI) among MOFs, polymer and Li‐salt is expected to promote Li+‐transport. However, it is unclear how to customize a strong LABI interface. The large surface‐area of classical MOFs also interferes with clarifying the LABI influence on Li+‐transport. Herein, Bi3+ as...
The next generation of high‐energy‐density storage devices is expected to be rechargeable lithium metal batteries. However, unstable metal‐electrolyte interfaces, dendrite growth, and volume expansion will compromise lithium metal batteries (LMB) safety and life. A simple drop‐casting method is used to create a double‐layer functional interface composed of inorganic mesoporous TiO2 and F‐rich organics...
Polymer‐based solid electrolytes (PSEs) offer great promise in developing lithium metal batteries due to their attractive features such as safety, light weight, low cost, and high processability. However, a PSE‐based lithium battery usually requires a relatively high temperature (60 °C or above) to complete charge and discharge due to the poor ionic conductivity of PSEs. Herein, a gel polymer electrolytes...
Lithium Metal Batteries
In article number 2106352, Fei Chen, Ben Bin Xu, and co‐workers develop a gel polymer electrolyte (GPE) with a supramolecular crosslinked structure and quadruple hydrogen bonding to fulfill a GPE with high thermal stability, good mechanical property and a high ionic conductivity of 3.8 × 10−3 S cm−1 at 25 °C. This work encompasses a route to develop high performance electrolyte...
Porous Aramid Nanofiber Films
In article number 2205355, Jeong Gon Son, Bongjun Yeom, and co‐workers report highly porous aramid nanofiber separators with dual porosity (>97%), prepared by a two‐step solvent exchange process, for Lithium‐metal batteries. The hierarchical porous structure with maximized porosity and selective affinity of the aramid nanofibers to anions shows effectively reduced...
The urgent demand for high energy and safety storage devices is pushing the development of lithium metal batteries. However, unstable solid electrolyte interface (SEI) formation and uncontrollable lithium dendrite growth are still huge challenges for the practical use of lithium metal batteries. Herein, a composite polymer electrolyte (CPE) endowed with designated ion channels is fabricated by constructing...
The growth of lithium (Li) dendrites reduces the lifespan of Li‐metal batteries and causes safety issues. Herein, hierarchically porous aramid nanofiber separators capable of effectively suppressing the Li dendrite growth while maintaining highly stable cycle performances at high charge/discharge rates are reported. A two‐step solvent exchange process combined with reprotonation‐mediated self‐assembly...
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