Co3O4 nanoparticle-dotted hierarchical-assembled carbon nanosheet framework catalysts with the formation/decomposition mechanisms of Li2O2 for smart lithium–oxygen batteries

Zhai, Yanjie; Yang, Wenyue; Xie, Xiubo; Sun, Xueqin; Wang, Jun; Yang, Xiaoyang; Naik, Nithesh; Kimura, Hideo; Du, Wei; Guo, Zhanhu; Hou, Chuanxin

doi:10.1039/d1qi01260f

Cited by 80 publications

(25 citation statements)

References 68 publications

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“…As shown in high-resolution XPS spectra of Co 2p in Fig. 3f, doublets of Co 2p 3/2 at 779.1 and 782 eV are ascribed to the Co-P and Co-O bonds, respectively, with a satellite peak located at 786.6 eV, and two peaks located at 794 and 798.3 eV are assigned to the Co 2p 1/2 with a satellite peak at 803.1 eV [37][38][39]. In the Mo 3d region in Fig.…”

Section: Resultsmentioning

confidence: 99%

Sandwich-like CoMoP2/MoP heterostructures coupling N, P co-doped carbon nanosheets as advanced anodes for high-performance lithium-ion batteries

Zhang

Liu

Zhao

et al. 2022

Adv Compos Hybrid Mater

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121

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Transition-metal phosphides as ideal anodes have been attracted a large number of interests due to their excellent performance for lithium-ion batteries. Nevertheless, CoMoP 2 materials were rarely reported as lithium-ion battery anode materials. Thereupon, to excavate their ability in LIBs, a sandwich-like architecture was employed as anode material, in which heterostructured CoMoP 2 and MoP nanoparticles were coated on N, P co-doped carbon matrix. Notably, doped carbon micro-lamellated sheets could not only allow boosted lithium-ion and electron transport, but also alleviate the volume changes of active material to sustain anode integrity during the discharge/charge processes. More importantly, the combination of CoMoP 2 and MoP nanoparticles could synergically strengthen the electrochemical activities of the anodes, and their built-in heterojunction facilitated the reaction kinetics on their interfaces. This research may offer a rational design on both heterostructure and doping engineering of future anodes for lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Sandwich-like CoMoP2/MoP heterostructures coupling N, P co-doped carbon nanosheets as advanced anodes for high-performance lithium-ion batteries

Zhang

Liu

Zhao

et al. 2022

Adv Compos Hybrid Mater

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121

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“…The Ir-CNT composite and CNTs were characterized by XRD. It can be seen from Figure 3a that both the diffraction peak of CNTs and the Ir-CNT composite exhibited diffraction peaks at around 26°, corresponded to the C (002) crystal plane [44] , and another relatively obvious diffraction peak of the Ir-CNT composite corresponds to the crystal Ir (111) crystal plane (JCPDS No.46-1044) [45] , which also illustrates the successful decoration of Ir nanoparticles. To further analyze the state of the metal element in the Ir-CNT composite, we carried out further XPS characterization.…”

Section: Resultsmentioning

confidence: 87%

“…The I D /I G value was used to characterize the graphitic or disorder states aspects. Figure 3d showed the Raman spectrum [45,46] of the composite, and the I D /I G intensity ratios of Ir-CNTs and CNTs are 1.50 and 1.18, respectively, demonstrating that its graphitization degree increased due to the incorporation of Ir nanoparticles on CNTs.…”

Section: Resultsmentioning

confidence: 99%

Iridium-decorated carbon nanotubes as cathode catalysts for Li-CO2 batteries with a highly efficient direct Li2CO3 formation/decomposition capability

Dang¹,

Zhang²

2022

MatLab

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Rechargeable Li-CO2 batteries are regarded as the ideal application for the superior energy storage technology. However, they still limited by the lack of high efficiency electrocatalyst and limited understanding for the electrochemical reaction mechanism. In this work, we prepared the Ir-CNT composite by a rotation hydrothermal method, which remarkably promoted the reaction kinetics and enhanced the electrocatalytic performance of Li-CO2 batteries. The incorporation of Ir nanoparticles shows high activity enhancement for the adsorption of Li2CO3 species, which was confirmed by density functional theory (DFT) calculations. The Ir-CNT cathode exhibited an excellent ability to catalyze the formation and decomposition of Li2CO3 during cycling. Therefore, a large specific capacity of 10325.9 mAh g -1 and an excellent high rate cyclability with stably over 100 cycles were achieved. The three-dimensional Ir-CNT cathode could spontaneously advance the electrocatalytic activity of CO2 oxidation and precipitation to increase specific capacities and cycle life, significantly boosting the practical application of Li-CO2 batteries.

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“…During FDM printing, the AC agent is able to degrade in the confined space of the flow channel with elevated temperature, and thus forms microspores in the printed scaffold. Along with the designed frame structure, a hierarchically porous structure was architected in the as-prepared PVDF/CNT scaffold. , As shown in Figure a,b, as CNT increased, the mean cell diameter gradually reduced from 32.1 to 16.4 μm with increasing cell density. Since CNTs can act as foreign filler in the PVDF matrix and exist between the mixture of polymer and gas, the nucleation process of the cell easily occurs on the CNT surface, following a typical heterogeneous nucleation process .…”

Section: Resultsmentioning

confidence: 99%

Toward Balanced Piezoelectric and Mechanical Performance: 3D Printed Polyvinylidene Fluoride/Carbon Nanotube Energy Harvester with Hierarchical Structure

Zheng

Song

et al. 2022

Ind. Eng. Chem. Res.

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With rapid consumption of fossil energy and its impact on the environment, the desire for clean energy is gradually increasing around the world, and piezoelectric polymers have received extensive attention owing to their capability to harvest discrete mechanical energy in the environment. However, the existing piezoelectric devices are mostly low-dimensional fibers or films, making it difficult to achieve a good balance between mechanical robustness and piezoelectric output. Herein, a polyvinylidene fluoride (PVDF)/multiwalled carbon nanotube (MWCNT) scaffold with a hierarchical porous structure and geometry was fabricated by chemical-foaming-assisted fused deposition modeling (FDM). Chemical foaming was triggered by the heat accompanied during FDM molding, where a microporous structure was formed inside the part without affecting the geometric design to realize strain accumulation in normal space. Moreover, the conductive MWCNT formed discontinuous and parallel morphology around the pores, which not only promotes the polling process and formation of electrets, but also avoids the electrical breakdown caused by the formation of the conductive network. Accordingly, the combined effect of hierarchical structure and incorporation of MWCNT leads to a balanced piezoelectric (open circuit voltage of 8.46 V and short circuit current of 157 nA) and mechanical performance (compressive modulus of 14.07 MPa). These excellent properties all demonstrate the potential capabilities of the developed piezoelectric nanogenerators in the field of self-powered nanosensors and portable devices.

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Co₃O₄ nanoparticle-dotted hierarchical-assembled carbon nanosheet framework catalysts with the formation/decomposition mechanisms of Li₂O₂ for smart lithium–oxygen batteries

Abstract: The Li-O2 batteries (LOB) have been regarded as a promising candidate for the next generation of electric vehicles owing to their excellent energy density. Nevertheless, the practical application of LOB...

Cited by 80 publications

References 68 publications

Sandwich-like CoMoP2/MoP heterostructures coupling N, P co-doped carbon nanosheets as advanced anodes for high-performance lithium-ion batteries

Sandwich-like CoMoP2/MoP heterostructures coupling N, P co-doped carbon nanosheets as advanced anodes for high-performance lithium-ion batteries

Iridium-decorated carbon nanotubes as cathode catalysts for Li-CO2 batteries with a highly efficient direct Li2CO3 formation/decomposition capability

Toward Balanced Piezoelectric and Mechanical Performance: 3D Printed Polyvinylidene Fluoride/Carbon Nanotube Energy Harvester with Hierarchical Structure

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