Liang Yanliang, Jing Yan, Gheytani Saman, Lee Kuan-Yi, Liu Ping, Facchetti Antonio, Yao Yan
Department of Electrical &Computer Engineering and Materials Science and Engineering Program, University of Houston, Houston, Texas 77204, USA.
Department of NanoEngineering, University of California, San Diego, California 92093, USA.
Nat Mater. 2017 Aug;16(8):841-848. doi: 10.1038/nmat4919. Epub 2017 Jun 19.
Aqueous rechargeable batteries provide the safety, robustness, affordability, and environmental friendliness necessary for grid storage and electric vehicle operations, but their adoption is plagued by poor cycle life due to the structural and chemical instability of the anode materials. Here we report quinones as stable anode materials by exploiting their structurally stable ion-coordination charge storage mechanism and chemical inertness towards aqueous electrolytes. Upon rational selection/design of quinone structures, we demonstrate three systems that coupled with industrially established cathodes and electrolytes exhibit long cycle life (up to 3,000 cycles/3,500 h), fast kinetics (≥20C), high anode specific capacity (up to 200-395 mAh g), and several examples of state-of-the-art specific energy/energy density (up to 76-92 Wh kg/ 161-208 Wh l) for several operational pH values (-1 to 15), charge carrier species (H, Li, Na, K, Mg), temperature (-35 to 25 °C), and atmosphere (with/without O), making them a universal anode approach for any aqueous battery technology.
水系可充电电池具备电网储能和电动汽车运行所需的安全性、坚固性、经济性及环境友好性，但其阳极材料的结构和化学不稳定性导致循环寿命较差，限制了其应用。在此，我们通过利用醌类结构稳定的离子配位电荷存储机制及其对水系电解质的化学惰性，报道醌类作为稳定的阳极材料。通过对醌类结构进行合理的选择/设计，我们展示了三个系统，这些系统与工业上成熟的阴极和电解质相结合，在多个工作pH值（-1至15）、电荷载流子种类（H、Li、Na、K、Mg）、温度（-35至25°C）和气氛（有/无O）条件下，展现出长循环寿命（高达3000次循环/3500小时）、快速动力学（≥20C）、高阳极比容量（高达200 - 395 mAh g）以及一些达到先进水平的比能量/能量密度（高达76 - 92 Wh kg / 161 - 208 Wh l），使其成为适用于任何水系电池技术的通用阳极方法。
