Densely Populated Bismuth Nanosphere Semi‐Embedded Carbon Felt for Ultrahigh‐Rate and Stable Vanadium Redox Flow Batteries

Zhou, Xuelong; Zhang, Xiangyang; Mo, Lanlan; Zhou, Xuechang; Wu, Qingyin

doi:10.1002/smll.201907333

Cited by 73 publications

(55 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies have reported improved electrochemical activity by applying electrocatalysts in carbon materials. [15][16][17][18][19] Transition metal oxides have attracted signicant attention as electrocatalysts because of the variable oxidation state of a transition metal that facilitates the redox reaction and the oxygen vacancy, which increases the electrochemical activity as an active site. 20,21 Oxygen vacancies have been intentionally employed in transition metal oxides as active sites for several electrochemical reactions in the eld of defect engineering.…”

Section: Introductionmentioning

confidence: 99%

Electrochemically induced catalytic adsorption sites in spent lithium-ion battery cathodes for high-rate vanadium redox flow batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemically induced catalytic adsorption sites in spent lithium-ion battery cathodes for high-rate vanadium redox flow batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Currently, catalysts primarily include metals, metal oxides, and carbon-based materials. Regarding metal catalysts [e.g., Cu (Wei et al, 2016), Ir (Wang et al, 2007) and Sb (Kou et al, 2020)], Zhou et al (2020) used semi-embedded carbon felt with bismuth nanospheres, which had good catalytic activity and could effectively promote the redox reaction of the negative electrode. For metal oxides [e.g., Nd 2 O 3 (Fetyan et al, 2018), MnO 2 (Ma et al, 2018), and PbO 2 (Wu et al, 2014)], Bayeh et al (2020) (Etesami et al, 2018)], Park et al (2013) demonstrated that carbon nanofiber/nanotube composite catalysts had good electrocatalytic performance in VRFB.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Catalysis of SnO2-CNTs Composite for VO2+/VO2+ and V2+/V3+ Redox Reactions

et al. 2021

View full text Add to dashboard Cite

In this study, a SnO2-carbon nanotube (SnO2-CNT) composite as a catalyst for vanadium redox flow battery (VRFB) was prepared using a sol-gel method. The effects of this composite on the electrochemical performance of VO2+/VO2+, and on the V2+/V3+ redox reactions and VRFB performance were investigated. The SnO2-CNT composite has better catalytic activity than pure SnO2 and CNT due to the synergistic catalysis of SnO2 and the CNT. SnO2 mainly provides the catalytic active sites and the CNTs mainly provide the three-dimensional structure and high electrical conductivity. Therefore, the SnO2-CNT composite has a larger specific surface area and an excellent synergistic catalytic performance. For cell performance, it was found that the SnO2-CNT cell shows a greater discharge capacity and energy efficiency. In particular, at 150 mA cm−2, the discharge capacity of the SnO2-CNT cell is 28.6 mAh higher than that of the pristine cell. The energy efficiency of the modified cell (7%) is 7.2% higher than that of the pristine cell (62.8%). This study shows that the SnO2-CNT is an efficient and promising catalyst for VRFB.

show abstract

“…Silver nitrate in ethylene glycol (10 mg mL −1 ) solution was coated onto the carbon wall via solution infiltration and thermal reduction processes. [74] Since the carbon is meso/microporous, the solution can wet both inner and outer surfaces. After drying with blowing hot air, the coated CC scaffold was heat-treated at 600 °C for 6 h. The areal mass of silver was around 1.0 mg cm −2 .…”

Section: Methodsmentioning

confidence: 99%

Operating High‐Energy Lithium‐Metal Pouch Cells with Reduced Stack Pressure Through a Rational Lithium‐Host Design

Ren

Shin

Manthiram

2022

Advanced Energy Materials

View full text Add to dashboard Cite

cyclability under low-Li-excess and lean electrolyte conditions. [20][21][22] The formation of a stable, dense, atomically thin solid electrolyte interphase (SEI) is critical to suppress the depletion of metallic Li and liquid electrolytes. However, the relatively thin SEI usually undergoes a repeated fracture and rebuilding process over cycling. [23,24] Transitioning from liquid electrolytes to more stable inorganic solid electrolytes offers a potential pathway to enable highly reversible Li-metal anode. [7,25,26] Careful cell and material design of anode-free Li metal || NMC full cells based on sulfide solid electrolytes has enabled thousands of full cycles without degradation. [27] Though solid electrolytes, such as the sulfide-based electrolytes, are unstable with Li metal, parasitic interfacial reaction ceases when a kinetically stable interphase layer is formed. [27] Moreover, the solid electrolyte usually displays a high stiffness and good ductility than the porous separator in liquid electrolyte cells; therefore, it performs as mechanically strong support to prevent the fracture of the interphase layer. [27,28] Despite these efforts, the interface between the Li-metal anode and solid electrolyte suffers from chemomechanical degradation under practical cycling conditions (e.g., high current density). [29][30][31] First, the Li stripping reaction creates voids at the Li-metal/solid electrolyte interface, inducing a loss of ionic contact (Figure 1a). [32] Moreover, high-rate Li plating induces nonuniformity in the stress and electric fields, leading to heterogeneous Li plating, and further deteriorating the interfacial contacts. [33][34][35][36][37] An impractically high stack pressure (e.g., >1.0 MPa) is constantly required during cell operation to smooth the surface of the planar Li-metal anode. [38] With a stack pressure of above 1.0 MPa, most solid-state cells were tested with pressure jigs and a rigid sleeve to avoid the side effects of Li-metal creep in the radial direction. [39] The complicated cell design increases the manufacturing cost and dilutes the celllevel energy. In contrast, the optimized stack pressure adopted by scalable Li-ion pouch cells is usually within the range of 0.05-0.5 MPa. [40] The design of a 3D Li-metal anode potentially enables a mild stack pressure since the high surface area of the anode scaffold provides more intimate ionic contacts (Figure 1b). In addition, a small local current at the interface benefits the interface stability. [41][42][43][44][45] However, this direction has Transitioning from a liquid electrolyte to an inorganic solid electrolyte offers a potential pathway to enable highly reversible lithium-metal anodes. However, the solid-electrolyte-protected lithium-metal anode suffers from poor interfacial ionic contacts and requires an impractically high stack pressure (>1.0 MPa) to maintain the interfacial contacts. It is demonstrated here that combining a hollow silver/carbon fiber scaffold and an inorganic/ organic composite electrolyte enables a highly revers...

show abstract

Densely Populated Bismuth Nanosphere Semi‐Embedded Carbon Felt for Ultrahigh‐Rate and Stable Vanadium Redox Flow Batteries

Cited by 73 publications

References 48 publications

Electrochemically induced catalytic adsorption sites in spent lithium-ion battery cathodes for high-rate vanadium redox flow batteries

Electrochemically induced catalytic adsorption sites in spent lithium-ion battery cathodes for high-rate vanadium redox flow batteries

Synergistic Catalysis of SnO2-CNTs Composite for VO2+/VO2+ and V2+/V3+ Redox Reactions

Operating High‐Energy Lithium‐Metal Pouch Cells with Reduced Stack Pressure Through a Rational Lithium‐Host Design

Contact Info

Product

Resources

About