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Highly Reversible Na-Intercalation into Graphite Recovered from Spent Li-Ion Batteries for High-Energy Na-Ion Capacitor.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-09-02 , DOI: 10.1002/cssc.202001355 Madhusoodhanan Lathika Divya 1 , Subramanian Natarajan 1 , Yun-Sung Lee 2 , Vanchiappan Aravindan 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-09-02 , DOI: 10.1002/cssc.202001355 Madhusoodhanan Lathika Divya 1 , Subramanian Natarajan 1 , Yun-Sung Lee 2 , Vanchiappan Aravindan 1
Affiliation
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High‐performance Na‐ion capacitor (NIC) was constructed with graphite recovered from spent Li‐ion batteries (LIBs) as battery‐type negative electrode and high‐surface‐area activated carbon as a supercapacitor component. Unlike Li‐insertion into graphite, Na‐insertion into graphite is extremely limited; hence, a “solvent‐co‐intercalation” mechanism was proposed for high reversibility using ether family solvents. First, the Na‐insertion properties were assessed in the half‐cell assembly with 0.5 m NaPF6 in tetraethylene glycol dimethyl ether as an electrolyte solution and compared with the commercial graphite. The NIC comprised pre‐sodiated graphite as a negative electrode and commercial activated carbon as a cathode. This fascinating NIC configuration displayed the maximum energy density of 59.93 Wh kg−1 with exceptional cyclability of 5000 cycles at ambient temperature with approximately 98 % retention. Interestingly, the electrode aging process in the presence of electrolyte resulted in approximately 19 % higher energy density than the routine electrode heat treatment. Further, the electrochemical activity of the NIC at various temperatures was studied, and it was found that the graphite recovered from spent LIBs could be effectively reused towards the construction of high‐performance charge storage devices with exceptional performance.
中文翻译：
从废锂离子电池中回收的高可逆Na嵌入石墨中，用于高能Na电容器。
高性能Na离子电容器（NIC）的构造是从用过的Li-ion电池（LIB）中回收的石墨作为电池型负极，并使用高表面积活性炭作为超级电容器组件。不同于将Li插入石墨中，将Na插入石墨中极为有限。因此，提出了一种使用醚族溶剂实现高可逆性的“溶剂-共插入”机制。首先，使用0.5 m NaPF 6在半电池组件中评估Na插入特性 在四甘醇二甲醚中作电解质溶液，并与市售石墨进行比较。NIC由预浸石墨作为负电极，由商用活性炭作为阴极。令人着迷的NIC配置显示最大能量密度为59.93 Wh kg -1在环境温度下具有5000次循环的出色循环能力，保留率约98％。有趣的是，在电解质存在下的电极老化过程导致能量密度比常规电极热处理高约19％。此外，研究了NIC在不同温度下的电化学活性，发现从废旧LIB中回收的石墨可有效地重复用于构建性能卓越的高性能电荷存储设备。
更新日期：2020-11-09
中文翻译：
从废锂离子电池中回收的高可逆Na嵌入石墨中，用于高能Na电容器。
高性能Na离子电容器（NIC）的构造是从用过的Li-ion电池（LIB）中回收的石墨作为电池型负极，并使用高表面积活性炭作为超级电容器组件。不同于将Li插入石墨中，将Na插入石墨中极为有限。因此，提出了一种使用醚族溶剂实现高可逆性的“溶剂-共插入”机制。首先，使用0.5 m NaPF 6在半电池组件中评估Na插入特性 在四甘醇二甲醚中作电解质溶液，并与市售石墨进行比较。NIC由预浸石墨作为负电极，由商用活性炭作为阴极。令人着迷的NIC配置显示最大能量密度为59.93 Wh kg -1在环境温度下具有5000次循环的出色循环能力，保留率约98％。有趣的是，在电解质存在下的电极老化过程导致能量密度比常规电极热处理高约19％。此外，研究了NIC在不同温度下的电化学活性，发现从废旧LIB中回收的石墨可有效地重复用于构建性能卓越的高性能电荷存储设备。
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