High-quality mesoporous graphene particles as high-energy and fast-charging anodes for lithium-ion batteries

Abstract

The application of graphene for electrochemical energy storage has received tremendous attention; however, challenges remain in synthesis and other aspects. Here we report the synthesis of high-quality, nitrogen-doped, mesoporous graphene particles through chemical vapor deposition with magnesium-oxide particles as the catalyst and template. Such particles possess excellent structural and electrochemical stability, electronic and ionic conductivity, enabling their use as high-performance anodes with high reversible capacity, outstanding rate performance (e.g., 1,138 mA h g −1 at 0.2 C or 440 mA h g −1 at 60 C with a mass loading of 1 mg cm −2 ), and excellent cycling stability (e.g., >99% capacity retention for 500 cycles at 2 C with a mass loading of 1 mg cm −2 ). Interestingly, thick electrodes could be fabricated with high areal capacity and current density (e.g., 6.1 mA h cm −2 at 0.9 mA cm −2 ), providing an intriguing class of materials for lithium-ion batteries with high energy and power performance.

Vacuum‐Dried 3D Holey Graphene Frameworks Enabling High Mass Loading and Fast Charge Transfer for Advanced Batteries

“…An obvious cathodic peak at around 0.5 V appeared in the first cycle and then disappeared in the following cycles, which indicated that a solid electrolyte interphase (SEI) layer from the electrolyte decomposition was formed in the first cycle. The CV profiles are generally consistent with the reported graphene electrode from the second cycle . From second to fifth cycles, the CV curves are almost overlapped, indicating the stable reversible Li + storage reactions of HGF.…”

“…We next compared the LIBs performance of HGF with representative anode in other studies (such as graphene and Si) and state‐of‐the‐art commercial graphite anodes. As far as we know, such a high area capacity HGF electrode with high mass loading even after a large number of cycles has rarely been reported for graphene and Si electrode materials with high theoretical capacity (Figure a), and the area capacity of HGF electrode is higher than the commercial graphite electrode materials although the HGF electrodes were tested at higher current density . In contrast, we further compare the areal capacity versus current density of HGF with researched graphene, graphite and Si anodes, and commercial graphite anodes .…”

Electrochemiluminescence Biosensors Using Screen-Printed Electrodes

“…In recent years, a huge boost has been observed in areas such as nanotechnology and nanoscience, being important the advances obtained in biomedicine [ 122 ], energy [ 123 ], catalysis [ 124 ] and electronic [ 125 ]. To a large extent, it has been due to the development and incorporation of new nanomaterials.…”

Multi-functional stretchable sensors based on a 3D-rGO wrinkled microarchitecture

“…Recently, graphene has been widely used in electrochemical sensing, photoelectric conversion and electromechanical sensing [15][16][17][18] owing to its superior electroconductivity, high thermal conductivity and great mechanical strength. [19][20][21][22] Compared to graphene, graphene oxide (GO), which is the derivative of graphene, has fascinating properties for a functional design.…”