Green Synthesis of a Reduced‐Graphene‐Oxide Wrapped Nickel Oxide Nano‐Composite as an Anode For High‐Performance Lithium‐Ion Batteries

Abstract

Aeschynomene aspera (AA) plant, a sustainable, waste natural carbon source, is used towards green and scalable synthesis of carbon two‐dimensional materials by simply altering the heating temperature and its composites with nickel oxide (NiO) are fabricated as an anode for high‐performance lithium‐ion batteries (LIBs). Interestingly, a wide range of carbon materials (amorphous carbon, graphene‐oxide (GO), and reduced‐graphene‐oxide(RGO)) can be synthesized from this carbon source that can be used in different applications. Among them, GO synthesized at 500 °C shows best lithium storage properties. While incase of composite the RGO‐NiO fabricated using heated AA plant, at 1000 °C shows excellent lithium storage properties. The RGO‐NiO composite exhibits reversible specific discharge capacity of 847 mAh g−1 at 100 mA g−1 and an excellent rate capability up to 1000 mA g−1. In addition, ex‐situ XRD and XPS measurements reveal reversible nature of the conversion reaction occurring in the composite electrodes.

Low-temperature green synthesis of few-layered graphene sheets from pomegranate peels for supercapacitor applications

“…A broad diffraction peak centred at 2θ value of ~ 24° with a calculated d-spacing of 0.37 nm corresponding to the 002 planes of graphitic structures is observed 35 . The broad spectrum observed is due to the amorphous nature of the synthesized few-layered graphene sheets 36 , specifically, the disorder of graphite layers caused by empty rooms between graphite layers 37 . The broad peak is also observed due to the broadening of the d spacing 21 .…”

Nitrogen‐doped Porous Carbon Nanofibers Decorated with Nickel Nanoparticles for Unlocking Low‐cost Structural Lithium Metal Anodes

“…[1][2][3][4][5] After more than 30 years of commercialization since 1990, lithium-ion batteries have almost reached the performance bottleneck, unable to meet the soaring demand for high energy storage. [6][7][8][9][10][11][12][13] Lithium metal anode is considered as the most promising anode material for the next-generation lithium batteries due to its low density (0.534 g cm À 3 ), lowest electrochemical reduction potential (À 3.04 V vs the standard hydrogen electrode) and unparalleled theoretical specific capacity (3860 mAh g À 1 ). [14][15][16][17][18] However, the growth of lithium dendrites poses many challenges for the commercialization of lithium metal batteries.…”

“…With the continuous development of industries such as modern electronic products and new energy vehicles, people have a higher pursuit for the energy density of secondary batteries [1–5] . After more than 30 years of commercialization since 1990, lithium‐ion batteries have almost reached the performance bottleneck, unable to meet the soaring demand for high energy storage [6–13] . Lithium metal anode is considered as the most promising anode material for the next‐generation lithium batteries due to its low density (0.534 g cm −3 ), lowest electrochemical reduction potential (−3.04 V vs the standard hydrogen electrode) and unparalleled theoretical specific capacity (3860 mAh g −1 ) [14–18] .…”