Aluminum hydride (AlH3) is a binary metal hydride with a mass hydrogen density of more than 10% and bulk hydrogen density of 148 kg H2/m3. Pure aluminum hydride can easily release hydrogen when heated. Due to the high hydrogen density and low decomposition temperature, aluminum hydride has become one of the most promising hydrogen storage media for wide applications, including fuel cell, reducing agents, and rocket fuel additive. Compared with aluminum powder, AlH3 has a higher energy density, which can significantly reduce the ignition temperature and produce H2 fuel in the combustion process, thus reducing the relative mass of combustion products. In this paper, the research progress about the structure, synthesis, and stability of aluminum hydride in recent decades is reviewed. We also put forward the challenges for application of AlH3 and outlook the possible opportunity for AlH3 in the future.
Micro
silicon (Si) has been one of the most promising anode materials
for lithium-ion batteries (LIBs) due to high theoretical specific
capacity and material sources. Nonetheless, an unavoidable huge volume
expansion of Si microparticles (SiMPs) and the uncontrolled growth
of the solid–electrolyte interphase (SEI) during the cycling
still inhibit its commercialization. Among the strategies to overcome
these problems, the design of a polymer binder is more feasible. Herein,
a binder derived from two of the most common polymers, polyurethane
(PU) and polydopamine (PDA), has been synthesized by a simple heating
and mixing method for SiMP anodes in LIBs. In the PU–PDA binder,
the synergistic effect of PU and PDA enables it to adapt to the volume
expansion of SiMPs and maintain the electrode integrity and provides
excellent cycling performance and long cycle life. The SiMP anodes
with the PU–PDA binder have a capacity retention above 1000
mA h g–1 after 1000 cycles at a current density
of 0.2 C and could deliver a discharging specific capacity of 1399
mA h g–1 at 4 C. Our research provides a safe, simple,
and efficient PU–PDA polymer binder for SiMP anodes in the
next-generation LIBs.
As a potential anode material for lithium-ion batteries (LIBs), silicon (Si) has been widely studied because of its high capacity, appropriate potential and abundant sources. However, due to the huge...
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