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Aqueous rechargeable batteries have drawn wide attention owing to the advantages of low cost, high safety, and rapid kinetic process. In recent years, the use of NH4+ ions and other nonmetallic ions as carrier batteries has come into researchers' view. The storage of NH4+ shows fast diffusion kinetics and the ability to achieve highly reversible redox processes by forming hydrogen bonds between NH4+ and electrode materials. Designing and exploration of advanced materials for NH4+ storage are of high significance in building high‐performance aqueous battery systems. This review summarizes the latest advances of critical materials, including Prussian blue analogs, transition metal oxides, and organic compounds for NH4+ batteries. Comparison of properties among different materials is discussed in detail. Different NH4+ storage behaviors according to several kinds of materials are demonstrated. Finally, the challenges and valuable perspectives for the further development of aqueous NH4+ batteries are also provided. [ABSTRACT FROM AUTHOR]

Li–S batteries can meet the demand of market development in terms of high energy density, but the notorious 'shuttle effect' and lithium dendrites pose a great threat to their cycling and safety performance, and greatly hinder their commercialization process. Under high sulfur loadings and high current densities, unsatisfactory cycling performances are also headache issues. Here, modified separators (SPLFPPD) with LiFePO4 (LFP) and Super P coating on the original separators (DKJ-14) are prepared to solve the above problems. The SPLFPPD has the advantages of a physical barrier to the polysulfides and promoting the catalytic conversion of polysulfides (S2− and sulfides). Besides, the SPLFPPD can enable the uniform deposition of lithium ions, increase ionic conductivities, and fully utilize active S substances. The capacity attenuation of the assembled Li–S batteries with the SPLFPPD is 0.062% per cycle at 1C after 800 cycles, and 0.045% per cycle at 5C after 1000 cycles. The specific capacity can be stable up to about 500 mA h g−1 after 400 cycles at 0.2C with a high S loading of 4.0 mg cm−2. After 100 cycles, no signs of corrosion or lithium dendrites were observed. This work provides a feasible way to prepare commercial separators for high-performance Li–S batteries. [ABSTRACT FROM AUTHOR]