One-step hydrothermal synthesis of 3D porous microspherical LiFePO4/graphene aerogel composite for lithium-ion batteries

Du, Guodong; Xi, Yakun; Tian, Xiaohui; Zhu, Yong; Zhou, Yingke; Deng, Chengji; Zhu, Hui; Angulakshmi, N.

doi:10.1016/j.ceramint.2019.06.035

Cited by 32 publications

(4 citation statements)

References 47 publications

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“…From the nitrogen adsorption desorption curves and pore size distribution curves of the materials in Figure 3c,d, it can be seen that the adsorption isotherms of both the ATP and GO−ATP are type IV adsorption isotherms [26], with a smooth and then rising trend in the first phase of the ATP, a slow rising trend in the medium pressure curve, and a rapid rise in the relative pressure in the range of 0.8-1.0, indicating the presence of microporous structures, belonging to the H3 type of hysteresis loop isotherm. The adsorption isotherms of the GO−ATP composites have an H4 type hysteresis loop, which may be due to the effective dispersion of the GO onto the ATP lamellae, forming micro−mesopores and a laminar aggregated structure with a high specific surface area [27].…”

Section: Characterization Results and Analysismentioning

confidence: 97%

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Sun

Chen

2022

Nanomaterials

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Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.

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Section: Characterization Results and Analysismentioning

confidence: 97%

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Sun

Chen

2022

Nanomaterials

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“…This is because of the permeation of water molecules between the layers of sensing nanomaterials, leading to their slow desorption. Recently, tremendous efforts have been devoted to judiciously engineering functional nanomaterials into 3D porous structures utilizing template methods [ 45 ], chemical etching methods [ 155 ] or hydrothermal methods [ 156 ]. Among them, the template method is a desired approach due to its facile and highly productive fabrication processes.…”

Section: Performance Enhancement For Flexible Humidity Sensorsmentioning

confidence: 99%

Multifunctional Flexible Humidity Sensor Systems Towards Noncontact Wearable Electronics

et al. 2022

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In the past decade, the global industry and research attentions on intelligent skin-like electronics have boosted their applications in diverse fields including human healthcare, Internet of Things, human–machine interfaces, artificial intelligence and soft robotics. Among them, flexible humidity sensors play a vital role in noncontact measurements relying on the unique property of rapid response to humidity change. This work presents an overview of recent advances in flexible humidity sensors using various active functional materials for contactless monitoring. Four categories of humidity sensors are highlighted based on resistive, capacitive, impedance-type and voltage-type working mechanisms. Furthermore, typical strategies including chemical doping, structural design and Joule heating are introduced to enhance the performance of humidity sensors. Drawing on the noncontact perception capability, human/plant healthcare management, human–machine interactions as well as integrated humidity sensor-based feedback systems are presented. The burgeoning innovations in this research field will benefit human society, especially during the COVID-19 epidemic, where cross-infection should be averted and contactless sensation is highly desired.

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“…One solution to overcome this is to transform two-dimensional graphene sheets into a 3D structure . GA-based composites can be formed as a result of the 3D structure and large surface area provided by GA, providing more active sites and fast electron transport kinetics. − The interlocking 3D macropores of GA can improve the transport pathway of Li + ions, allowing better penetration of the electrolyte and thereby increasing the electrode capacity and significantly accelerating the electron transfer necessary to further increase the rated capacity of lithium-ion batteries . Tian et al developed a new 3D porous graphene aerogel composite to increase the contact area of the LiNi 0.6 Co 0.2 Mn 0.2 O 2 nanoparticle with the cathode and electrolyte and showed superior electrochemical properties compared to pure LiNi 0.6 Co 0.2 Mn 0.2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

“… 42 − 45 The interlocking 3D macropores of GA can improve the transport pathway of Li + ions, allowing better penetration of the electrolyte and thereby increasing the electrode capacity and significantly accelerating the electron transfer necessary to further increase the rated capacity of lithium-ion batteries. 46 Tian et al 47 developed a new 3D porous graphene aerogel composite to increase the contact area of the LiNi 0.6 Co 0.2 Mn 0.2 O 2 nanoparticle with the cathode and electrolyte and showed superior electrochemical properties compared to pure LiNi 0.6 Co 0.2 Mn 0.2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Cobalt-Free Layered LiNi_0.8Mn_0.15Al_0.05O₂/Graphene Aerogel Composite Electrode for Next-Generation Li-Ion Batteries

et al. 2023

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In this work, we introduce LiNi0.8Mn0.15Al0.05O2 (NMA), which is cobalt-free and has a high nickel content, and a conductive composite material to NMA by supporting it with a three-dimensional (3D) graphene aerogel (GA). With an easy freeze-drying approach, NMA nanoparticles are properly dispersed on graphene sheets, and GA creates a strong and conductive framework, significantly improving the structure and conductivity. The structure of the pure NMA and NMA/graphene aerogel (NMA/GA) composite was investigated by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). XRD and FE-SEM analyses clearly indicated that ultrapure NMA structures are homogeneously dispersed among the GAs. In addition, the composite structure was examined using transmission electron microscopy (TEM) to determine the dispersion mechanisms. The electrochemical cycling performance of the pure NMA and NMA/GA composite was evaluated by rate capacitance, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The synthesized NMA/GA was able to provide 89.81% specific capacity retention after the 500th cycle at C/2. The average charge/discharge rates of the obtained cathode show good electrochemical results and exhibit capacities of 190.2,186.3, 185.2, 176.2, 161.2,142.6, and 188.5 mAh g–1 at C/20, C/10, C/5, C, 3C, 5C, and C/20, respectively. EIS data showed an improvement in the impedance of the composite containing GA. According to the results of the electrochemical tests, NMA nanoparticles formed a conductive network with its porous structure thanks to GA, formed a protective layer on the surface, prevented the side reactions between the cathode and the electrolyte, decreased the impedance of the cathode, and increased the redox kinetics. In addition, the changes in the structure were investigated in the NMA/GA composite cathode by XRD, FE-SEM, and Raman analyses at the end of the 50th, 250th, and 500th cycles. In summary, the NMA/GA cathode is expected to play an important role in lithium-ion batteries (LIBs) by taking advantage of its easy synthesis and excellent cycle stability.

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One-step hydrothermal synthesis of 3D porous microspherical LiFePO4/graphene aerogel composite for lithium-ion batteries

Cited by 32 publications

References 47 publications

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Multifunctional Flexible Humidity Sensor Systems Towards Noncontact Wearable Electronics

Cobalt-Free Layered LiNi_0.8Mn_0.15Al_0.05O₂/Graphene Aerogel Composite Electrode for Next-Generation Li-Ion Batteries

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One-step hydrothermal synthesis of 3D porous microspherical LiFePO4/graphene aerogel composite for lithium-ion batteries

Cited by 32 publications

References 47 publications

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Multifunctional Flexible Humidity Sensor Systems Towards Noncontact Wearable Electronics

Cobalt-Free Layered LiNi0.8Mn0.15Al0.05O2/Graphene Aerogel Composite Electrode for Next-Generation Li-Ion Batteries

Contact Info

Product

Resources

About

Cobalt-Free Layered LiNi_0.8Mn_0.15Al_0.05O₂/Graphene Aerogel Composite Electrode for Next-Generation Li-Ion Batteries