Flexible Li[Li0.2Ni0.13Co0.13Mn0.54]O2/Carbon Nanotubes/Nanofibrillated Celluloses Composite Electrode for High-Performance Lithium-Ion Battery

Abstract

Rapidly-growing demand for wearable and flexible devices is boosting the development of flexible lithium ion batteries (LIBs). The exploitation of flexible electrodes with high mechanical properties and superior electrochemical performances has been a key challenge for the rapid practical application of flexible LIBs. Herein, a flexible composite electrode was prepared from the mixed solutions of Li[Li 0.2 Ni 0.13 Co 0.13 Mn 0.54 ]O 2 (LLOs), carbon nanotubes(CNTs), and nanofibrillated celluloses (NFCs) via a vacuum filtration method. The resulting LLOs/CNTs/NFCs electrode delivered an initial discharge capacity of 253 mAh g −1 at 0.1 C in the voltage range from 2.0 to 4.6 V, and retained a reversible capacity of 178 mAh g −1 with 83% capacity retention after 100 cycles at 1 C. The LLOs/CNTs/NFCs electrode exhibited excellent flexibility along with repeated bending in the bending test. The LLOs/CNTs/NFCs electrode after bending test remained a discharge capacity of 149 mAh g −1 after 100 cycles at 1 C, and the corresponding capacity retentions was 76%. The excellent electrochemical performance and high flexibility can be ascribed to the framework formed by CNTs with high conductivity and NFCs with good mechanical properties. The results imply that the as-fabricated electrode can be a promising candidate for the flexible LIBs.

Co-Ni Basic Carbonate Nanowire/Carbon Nanotube Network With High Electrochemical Capacitive Performance via Electrochemical Conversion

“…In recent years, effective energy storage and utilization have attracted much attention for the fast development of electronic devices and the increasing environmental problems (Liu et al, 2010;Zhou et al, 2019a) Among various energy storage strategies, electrochemical energy storage usually plays a key role in the individual electrical and electronic devices with the requirement of stable power supplement (Mathis et al, 2019;Wang et al, 2020) As an important part of electrochemical energy storage device, the electrode should match various requirements for effective energy storage and power supplement, such as high conductivity, high power and energy density, long cycle stability, facile synthesis, high utilization, low cost and environmental friendliness. In different electrochemical energy storage devices, the metallic compounds (usually hydroxide or oxide) with high energy densities and capacities but poor conductivity are used as the electrodes (Nguyen and Montemor 2017;Li et al, 2019) To increase the power density and active the batteries materials, the electrodes with high conductivity are necessary (Chen et al, 2019;Kim and Moon 2020) In commercialized electrodes, the simple mixing of electrochemical active materials and the conductive fillers is a common method. However, the conductive additive unavoidably sacrifices overall energy storage capacity and the mixture with low ratio of conductive fillers could not ensure the stable conductive network in the electrodes, which limits the performance of the electrodes (Farzaneh and Hadi, 2019) To enhance the construction of the conductive network in the electrodes, direct growth of electrochemical active materials on the as-prepared conductive network is an effective approach.…”

One-Step Microwave Synthesis of Micro/Nanoscale LiFePO4/Graphene Cathode With High Performance for Lithium-Ion Batteries

“…Small particle size can decrease the migration distance of lithium ions from the interior to the surface and increase the diffusion rate (Lim et al, 2008;Hai et al, 2019;Li et al, 2019;Xiao et al, 2019). Various techniques, including solid-state reaction (Zheng et al, 2008), sol-gel (Zhang et al, 2011) hydrothermal (Kiyoshi et al, 2008;Chang et al, 2014), co-precipitation (Park et al, 2003;Wang et al, 2013), and microwave heating (Wang et al, 2007;Beninati et al, 2008;Guo et al, 2010), are adopted to control particle size.…”

Optimal Quantity of Nano-Silicon for Electrospun Silicon/Carbon Fibers as High Capacity Anodes

“…The development of new materials with excellent performance and low cost is of great significance for improving battery performance and reducing battery cost. Therefore, research on LIBs should mainly focus on the three aspects of battery cost, battery capacity, and new electrode materials (Lv et al, 2018a(Lv et al, ,b, 2019An et al, 2019;Li Y. et al, 2019;Wu et al, 2019;Yuan et al, 2019). With the development of anode materials for LIBs, the defects and advantages of various new materials are highlighted.…”