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Multifunctional bio carbon: a coir pith waste derived electrode for extensive energy storage device applications

机译:多功能生物碳:椰壳废料衍生的电极,适用于广泛的能量存储设备应用

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As a sequel to our earlier findings on the suitability of coir pith derived carbon (CPC) in lithium-ion and lithium sulfur batteries, the extended suitability of CPC electrode for sodium-ion batteries (SIBs) and electrical double layer capacitors (EDLCs) has been demonstrated through the present work. Herein, the activation temperature of CPC plays a vital role and an optimum temperature of 850 °C is found to be essential to demonstrate superior electrochemical performance in sodium-ion batteries and the product is denoted as CPC-850. An initial capacity of 280 mA h g?1 and a progressive capacity of 220 mA h g?1 up to 300 cycles with negligible capacity fading have been observed at 50 mA g?1. Furthermore, CPC-850 delivers ~110 mA h g?1 for 1000 cycles at 1 A g?1 and demonstrates tolerance up to 5 A g?1, corresponding to 13.44C rate. In EDLCs, a CPC-850 symmetric cell exhibits 191 F g?1 at 0.1 A g?1 current density. Notably, CPC-850//CPC-850 withstands rated currents such as 1, 2, 5 and 10 A g?1 and delivers 168, 152, 150 and 128 F g?1 up to 10?000 cycles. Hence, the multifunctional capability and versatile suitability of the CPC electrode in electrochemical energy storage devices could be understood.
机译:作为我们先前关于椰壳粉衍生碳(CPC)在锂离子和锂硫电池中的适用性的早期发现的结果,CPC电极对钠离子电池(SIB)和双电层电容器(EDLC)的适用性得到了扩展通过当前的工作得到了证明。在此,CPC的活化温度起着至关重要的作用,并且发现850°C的最佳温度对于证明钠离子电池的优异电化学性能至关重要,因此将其称为CPC-850。初始容量为280 mA hg ?1 ,渐进容量为220 mA hg ?1 ,最高可达300在50 mA g ?1 处观察到的容量衰减可忽略不计的循环。此外,CPC-850在1 A g ?1 和1000 A循环下可提供〜110 mA hg ?1 表现出高达5 A g ?1 的容差,对应于13.44C的速率。在EDLC中,CPC-850对称电池在0.1 A g ?1 电流下显示191 F g ?1 密度。值得注意的是,CPC-850 // CPC-850可承受1、2、5和10 A g ?1 等额定电流,并提供168、152、150和128 F g ?1 最多10?000个周期。因此,可以理解CPC电极在电化学储能装置中的多功能性和通用性。

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