and long-term durability over 500 h. Our findings highlight the accelerated water-splitting performance on the oxygen-vacancy and interface modulated catalysts and shed light on the fabrication of advanced heterostructures for other catalytic reactions. Figure 7. a) The schematic illustration of the CrO x -Ni 3 N for overall water splitting. b) The performance of the CrO x -Ni 3 N//CrO x -Ni 3 N and Ni 3 N//Ni 3 N for overall water splitting, the inset image shows the comparison of the needed voltage to drive 10 mA cm −2 for the CrO x -Ni 3 N//CrO x -Ni 3 N and Ni 3 N//Ni 3 N. c) The Faradaic efficiency testing device and d) the corresponding Faradaic efficiencies for HER and OER. e) Long-term stabilities of the CrO x -Ni 3 N//CrO x -Ni 3 N and Ni 3 N//Ni 3 N at 50 mA cm −2 .
Solid‐state lithium metal batteries built with composite polymer electrolytes using cubic garnets as active fillers are particularly attractive owing to their high energy density, easy manufacturing and inherent safety. However, the uncontrollable formation of intractable contaminant on garnet surface usually aggravates poor interfacial contact with polymer matrix and deteriorates Li+ pathways. Here we report a rational designed intermolecular interaction in composite electrolytes that utilizing contaminants as reaction initiator to generate Li+ conducting ether oligomers, which further emerge as molecular cross‐linkers between inorganic fillers and polymer matrix, creating dense and homogeneous interfacial Li+ immigration channels in the composite electrolytes. The delicate design results in a remarkable ionic conductivity of 1.43×10−3 S cm−1 and an unprecedented 1000 cycles with 90 % capacity retention at room temperature is achieved for the assembled solid‐state batteries.
All-solid-state lithium
metal batteries are highly attractive because of their high energy
density and inherent safety. However, it is still a great challenge
to design the solid electrolytes with high ionic conductivity at room
temperature and good electrode/electrolyte interfacial compatibility
simultaneously in a facile and scalable way. In this work, for the
first time, the combination of salt affluent Poly(ethylene oxide)
with Li6.75La3Zr1.75Ta0.25O12 nanofibers was designed and intensively evaluated.
The synergistic effect of each component in the electrolyte enhances
the ionic conductivity to 2.13 × 10–4 S cm–1 at 25 °C and exhibits a high transference number
of 0.57. The composite electrolyte possesses superior interfacial
stability against Li metal for over 680 h in Li symmetric cells even
at a relatively high current density of 2 mA cm–2. The all-solid-state batteries employing the solid electrolytes
exhibit excellent cycling stability at room temperature and superior
safety performance. This work proposes a brand-new strategy to design
and fabricate solid electrolytes in a versatile way for room-temperature
all-solid-state batteries.
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