Liu Yue, Hu Qiyang, Zhong Jing, Wang Zhixing, Guo Huajun, Yan Guochun, Li Xinhai, Peng Wenjie, Wang Jiexi
School of Metallurgy and Environment, Central South University, Changsha, 410083, P.R. China.
Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, PR China.
iScience. 2020 Nov 19;23(12):101821. doi: 10.1016/j.isci.2020.101821. eCollection 2020 Dec 18.
Low-cost, scalable energy storage is the key to continuing growth of renewable energy technologies. Here a battery with sedimentary slurry electrode (SSE) is proposed. Through the conversion of discrete particles between sedimentary and suspending types, it not only inherits the advantages of semi-solid flow cell but also exhibits high energy density and stable conductive network. Given an example, the zinc SSE (ZSSE) delivers a large discharge capacity of 479.2 mAh g at 10 mA cm. More importantly, by renewal of the slurry per 20 cycles, it can run for 112 and 75 cycles before falling below 80% of designed capacity under 10 mA cm (20% DOD) and 25 mA cm (25% DOD), respectively. The lost capacity after cycles is able to recover after slurry renewal and the end-of-life SSE can be easily reused by re-formation. The concept of SSE brands a new way for electrochemical energy storage.
低成本、可扩展的储能是可再生能源技术持续发展的关键。本文提出了一种具有沉积浆料电极（SSE）的电池。通过离散颗粒在沉积型和悬浮型之间的转换，它不仅继承了半固态液流电池的优点，还展现出高能量密度和稳定的导电网络。以锌沉积浆料电极（ZSSE）为例，在10 mA/cm²时，其放电容量高达479.2 mAh/g。更重要的是，每20个循环更新一次浆料，在10 mA/cm²（20%深度放电）和25 mA/cm²（25%深度放电）条件下，分别可运行112次和75次循环，直至容量降至设计容量的80%以下。循环后损失的容量在更新浆料后能够恢复，并且寿命终止的SSE通过重新形成可以很容易地再次使用。沉积浆料电极的概念为电化学储能开辟了一条新途径。
