Nungu Israel Nungu, Kelvin Jenerali Nyamtara, Neema Cyril Karima, Sung Hoon Kim, Manh Cuong Nguyen, Thi Phuong Mai Duong, Sung Nam Lim, Yun-Seok Jun, Wook Ahn
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Notably, the composite has high-rate capability, providing capacities of 230 and 178.9 mAh g<sup>−1</sup> at 0.2 and 2 C, respectively. These experimental results indicate that the well-dispersed LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> nanoparticles and the porous reduced graphene oxide framework work in concert to enhance the electrochemical performance of the reduced graphene oxide-wrapped LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> cathode material, which was achieved through ultrasonication with Triton X (TX-100) surfactant assistance. This synergy allows for the fast diffusion of both Li ions (Li<sup>+</sup>) and electrons (e<sup>−</sup>) while also allowing volumetric variations during the introduction and withdrawal of Li ions (Li<sup>+</sup>). 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引用次数: 0
摘要
我们使用 Triton X 作为表面活性剂,通过超声合成了一种锂过量并包裹着还原氧化石墨烯(rGO)的混合材料 LiNi0.8Co0.1Mn0.1O2。超声处理过程将最初聚集在一起的大颗粒分解成小的纳米颗粒,确保了与还原氧化石墨烯的均匀复合。阴极复合材料在 0.1 C 条件下的初始容量约为 250 mAh g-1,在 100 次循环中的容量保持率为 87.56%。值得注意的是,该复合材料具有高速率能力,在 0.2 C 和 2 C 条件下可分别提供 230 mAh g-1 和 178.9 mAh g-1 的容量。这些实验结果表明,分散良好的 LiNi0.8Co0.1Mn0.1O2 纳米粒子和多孔还原氧化石墨烯框架协同作用,提高了还原氧化石墨烯包裹 LiNi0.8Co0.1Mn0.1O2 阴极材料的电化学性能。这种协同作用可实现锂离子(Li+)和电子(e-)的快速扩散,同时还能在锂离子(Li+)的引入和撤出过程中实现体积变化。因此,这种还原氧化石墨烯包裹的 LiNi0.8Co0.1Mn0.1O2 阴极材料的制备表明,它有望成为一种高速率的阴极材料,尤其适用于储能应用。
Facile Synthesis Method of Self-Assembled Ni-Rich LiNi0.8Mn0.1Co0.1O2/rGO Composite for High-Performance Li-Ion Batteries
A hybrid material, LiNi0.8Co0.1Mn0.1O2, with excess lithium and wrapped in reduced graphene oxide (rGO), has been synthesized through ultrasonication employing Triton X as a surfactant. The ultrasonication process breaks down the initially clustered large particles into small nanoparticles, ensuring a uniform composite with reduced graphene oxide. With a consistent capacity retention of 87.56% over 100 cycles, the cathode composite exhibits a promising initial capacity of around 250 mAh g−1 at 0.1 C. Notably, the composite has high-rate capability, providing capacities of 230 and 178.9 mAh g−1 at 0.2 and 2 C, respectively. These experimental results indicate that the well-dispersed LiNi0.8Co0.1Mn0.1O2 nanoparticles and the porous reduced graphene oxide framework work in concert to enhance the electrochemical performance of the reduced graphene oxide-wrapped LiNi0.8Co0.1Mn0.1O2 cathode material, which was achieved through ultrasonication with Triton X (TX-100) surfactant assistance. This synergy allows for the fast diffusion of both Li ions (Li+) and electrons (e−) while also allowing volumetric variations during the introduction and withdrawal of Li ions (Li+). As a result, the fabrication of this reduced graphene oxide-wrapped LiNi0.8Co0.1Mn0.1O2 cathode material shows promise as a high-rate cathode material, especially for energy storage applications.
期刊介绍:
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