A garnet-type solid-state electrolyte Li6.4La3Zr1.4Ta0.6O12 (LLZTO) was modified using dopamine to improve the wettability of LLZTO with PEO, allowing 80 wt% LLZTO to be uniformly dispersed in 20 wt% PEO/LiTFSI polymer electrolyte.

No abstract

Sun, wind and tides have huge potential in providing us electricity in an environmental-friendly way. However, its intermittency and non-dispatchability are major reasons preventing full-scale adoption of renewable energy generation. Energy storage will enable this adoption by enabling a constant and high-quality electricity supply from these systems. But which storage technology should be considered is one of important issues. Nowadays, great effort has been focused on various kinds of batteries to store energy, lithium-related batteries, sodium-related batteries, zinc-related batteries, aluminum-related batteries and so on. Some cathodes can be used for these batteries, such as sulfur, oxygen, layered compounds. In addition, the construction of these batteries can be changed into flexible, flow or solid-state types. There are many challenges in electrode materials, electrolytes and construction of these batteries and research related to the battery systems for energy storage is extremely active. With the myriad of technologies and their associated technological challenges, we were motivated to assemble this 2020 battery technology roadmap.

High-energy-density battery systems have been critical to applications in consumer electronics, aviation, electric vehicles, and emerging large-scale stationary storage. Here, we report a solid-electrolyte-based liquid Li-S and Li-Se (SELL-S and SELL-Se in short) battery system with the potential to deliver energy density exceeding 500 Wh kg À1 and 1,000 Wh L À1 , together with the ability of low cost and stable electrochemical performance for future concentrated and largescale storage applications.

No abstract

No abstract

The application of Li-ion conducting garnet electrolytes is challenged by their large interfacial resistance with the metallic lithium anode and the relative small critical current density at which the lithium dendrites short-circuit the battery. Both of these challenges are closely related to the morphology and the structure of the garnet membranes. Here, we prepared four polycrystalline garnet Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) pellets with different particle sizes (nano/micro) and grain boundary additive (with/without Al 2 O 3 ) to investigate the influence of grain size, the composition of the grain boundary, and the mechanical strength of the pellet on the total Li-ion conduction of the pellet, Li/garnet interfacial transfer, and lithium dendrite growth in all-solid-state Limetal cells. The results showed that the garnet pellets prepared with nanoparticles and LiAlO 2 -related grain boundary phase had decreased total Li-ion conductivity because of the increased resistance of the grain boundary; however, these pellets showed higher mechanical strength and improved capability to suppress lithium dendrite growth at high current densities. By controlling the grain size and optimizing the grain boundary with Al 2 O 3 sintering additive, the hot-pressing sintered LLZTO solid electrolytes can reach up to 1.01 × 10 −3 S cm −1 in Li + conductivity and 0.29 eV in activation energy. LLZTO with nanosized grain and LiAlO 2 -modified grain boundary showed the highest critical current density, which is 0.6 mA cm −2 at room temperature and 1.7 mA cm −2 at 60 °C. This study offers a useful guideline for preparing a high-performance LLZTO solid electrolyte.

In situ preparation of a long cycle life CuO–Cu integrated anode on a Cu current collector by one-step laser ablation.