Electrical Conductivity Gradients: Electrical Conductivity Gradient Based on Heterofibrous Scaffolds for Stable Lithium‐Metal Batteries (Adv. Funct. Mater. 14/2020)

Hong, Sang-Ho; Jung, Dong‐Won; Kim, Jung‐Hwan; Lee, Yong‐Hyeok; Cho, Sung‐Ju; Joo, Sang Hoon; Lee, Hyun‐Wook; Lee, Ki‐Suk; Lee, Sang Young

doi:10.1002/adfm.202070088

Cited by 4 publications

(4 citation statements)

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“…Generally, gradient structure can be divided into conductivity gradient (CG) [128,129] , lithiophilicity gradient [130][131][132] , and dual gradient skeleton [133,134] . Table 3 presents the progress of different lithiophilic hosts with the gradient skeleton strategy [124,128,130,131,[135][136][137][138][139] .…”

Section: Gradient Skeletonmentioning

confidence: 99%

“…Hong et al introduced an electronic CG host through a vacuum-assisted infiltration method as an effective measure to inhibit dendrite growth on the anode surface [135] . The CG consists of a top insulating layer of SiO 2 and CNFs, a middle layer of Cu nanowires (CuNWs) and CNFs with intermediate conductivity, and a bottom layer of CuNWs and CNFs [Figure 9B].…”

Section: Conductivity Gradientmentioning

confidence: 99%

“…Copyright 2020, Elsevier; (B) Schematic diagram of the CG host structure and Li-ion reaction flux modeled using COMSOL Multiphysics. Reproduced with permission [135] . Copyright 2020, Wiley-VCH; (C) Schematic of the G-CNF electrode in regulating Li deposition.…”

Section: Lithiophilicity Gradientmentioning

confidence: 99%

“…; 500 h 5 mA•cm -2 ; 1 mAh•cm -2 ; 200 h [135] G-CNF Gradient-distributed nucleation seeds on carbon nanofiber 0.5 mA•cm -2 ; 700 cycles; 98.1% 0.2 mA•cm -2 ; 0.2 mAh•cm -2 ; 1,800 h 1 C; 300 cycles; 95.7% [130] CuSnAl@Cu 1 mA•cm -2 ; 1 mAh•cm -2 ; 2,000 h 1 C; 300 cycles; 62% [131] DRS Deposition-regulating scaffold 1 mA•cm -2 ; 1 mAh•cm -2 ; 500 cycles; 98.1% 0.5 mA•cm -2…”

Section: Declarationsmentioning

confidence: 99%

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Engineering of lithiophilic hosts for stable lithium metal anodes

Huang,

Li,

Cui

2024

Energy Mater

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Lithium (Li0) metal has been deemed the desired anode for the future of cutting-edge rechargeable Li batteries benefiting from its lowest reduction potential and ultrahigh theoretical specific capacity. Nevertheless, the large-scale applications of Li metal batteries are restricted by scattered Li dendrite formation and uncontrollable volume expansion. To address these issues, a currently prevalent measure is to use structured lithiophilic hosts for Li metal. The enhanced lithiophilicity of hosts is significant for regulating the Li nucleation barrier. By virtue of these lithiophilic measures, the Li nucleation sites will be well controlled and the Li plating layer will be more stable. Through this article, we classified various lithiophilic hosts and described their applications for Li metal batteries, including heteroatom-doping carbon, lithiophilic-material loading hosts and gradient skeletons. We discussed the inherent advantages and lithophilic mechanisms of these hosts on optimizing the lithophilic properties and analyzed various factors that induced the formation of dendrite Li. Moreover, the review outlines the current challenges and perspectives for Li metal anodes, and some understanding of the lithiophilic chemistry is given.

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Section: Gradient Skeletonmentioning

confidence: 99%

Section: Conductivity Gradientmentioning

confidence: 99%

Section: Lithiophilicity Gradientmentioning

confidence: 99%

Section: Declarationsmentioning

confidence: 99%

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Engineering of lithiophilic hosts for stable lithium metal anodes

Huang,

Li,

Cui

2024

Energy Mater

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Dual‐Gradient Engineering of Conductive and Hierarchically Potassiophilic Network for Highly Stable Potassium Metal Anode

Zhang,

Liu,

Shi

et al. 2024

Advanced Energy Materials

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Potassium (K) metal anodes are the most competitive candidates for low‐cost and high‐energy density rechargeable batteries. However, uncontrolled K dendrite growth strictly impedes the practical application of K metal anodes. Herein, a potassiophilic and conductive dual‐gradient free‐standing host (named TS‐PKS) composed of the bottom layer with Ti3CN and F doped SnO2 (F‐SnO2) and the top layer with perfluorinated sulfonic acid K (PFSA‐K) and ordered mesoporous silica (SBA15) is constructed to achieve dendrite‐free K deposition. The potassiophilicity and conductivity of the TS‐PKS host increase along with the depth direction to generate a bottom‐up dual‐gradient of K+ affinity and electroconductivity. Such bottom‐up dual‐gradient of K+ affinity and electroconductivity can synergistically manipulate uniform K metal deposition following the bottom‐up manner, preventing the notorious K dendrite growth. As a result, the TS‐PKS@K symmetric cell can stably cycle over 2800 h at 0.5 mA cm−2/0.5 mAh cm−2. Meanwhile, the TS‐PKS@K//PTCDA full battery also exhibits an initial specific capacity of 118.3 mAh g−1 at a high current density of 500 mA g−1 and maintains up to 81.1 mAh g−1 after 1000 cycles. This novel dual‐gradient strategy design offers a straightforward approach to effectively manipulate K metal deposition manner for achieving dendrite‐free K metal anodes.

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