Covalent organic framework based lithium-ion battery: Fundamental, design and characterization

Hu, Yueyun; Wayment, Lacey J.; Haslam, Catherine G.; Yang, Xiye; Lee, Se-Hee; Jin, Yinghua; Zhang, Wei

doi:10.1016/j.enchem.2020.100048

Cited by 114 publications

(93 citation statements)

References 98 publications

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“…Those superiorities drive the utilization of LIBs in many applications, such as portable electronic devices, electric vehicles (EVs), and stationary energy storage [3]. However, traditional LIBs use graphite anodes, which possess a relatively low specific capacity (372 mAh g −1 ), limiting their achievable energy density [4]. Various materials with higher theoretical capacities have been pursued as alternatives for the graphite anode, such as Co 3 O 4 (890 mAh g −1 ), Sn (994 mAh g −1 ), Ge (1625 mAh g −1 ), MgH 2 (2038 mAh g −1 ), and Si (4200 mAh g −1 ) [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Vertically Aligned n-Type Silicon Nanowire Array as a Free-Standing Anode for Lithium-Ion Batteries

et al. 2021

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Due to its high theoretical specific capacity, a silicon anode is one of the candidates for realizing high energy density lithium-ion batteries (LIBs). However, problems related to bulk silicon (e.g., low intrinsic conductivity and massive volume expansion) limit the performance of silicon anodes. In this work, to improve the performance of silicon anodes, a vertically aligned n-type silicon nanowire array (n-SiNW) was fabricated using a well-controlled, top-down nano-machining technique by combining photolithography and inductively coupled plasma reactive ion etching (ICP-RIE) at a cryogenic temperature. The array of nanowires ~1 µm in diameter and with the aspect ratio of ~10 was successfully prepared from commercial n-type silicon wafer. The half-cell LIB with free-standing n-SiNW electrode exhibited an initial Coulombic efficiency of 91.1%, which was higher than the battery with a blank n-silicon wafer electrode (i.e., 67.5%). Upon 100 cycles of stability testing at 0.06 mA cm−2, the battery with the n-SiNW electrode retained 85.9% of its 0.50 mAh cm−2 capacity after the pre-lithiation step, whereas its counterpart, the blank n-silicon wafer electrode, only maintained 61.4% of 0.21 mAh cm−2 capacity. Furthermore, 76.7% capacity retention can be obtained at a current density of 0.2 mA cm−2, showing the potential of n-SiNW anodes for high current density applications. This work presents an alternative method for facile, high precision, and high throughput patterning on a wafer-scale to obtain a high aspect ratio n-SiNW, and its application in LIBs.

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Section: Introductionmentioning

confidence: 99%

Vertically Aligned n-Type Silicon Nanowire Array as a Free-Standing Anode for Lithium-Ion Batteries

et al. 2021

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“…[ 265–270 ] These porous crystalline COFs feature tunable, designable, and functionalizable nanospaces, which together with the frameworks of COFs allow the predesigned integration of different functionalized moieties for targeted applications. [ 271 ] For example, Feng et al. prepared 2D porphyrin COFs that exhibited high rates of electron and hole conductivity; [ 272 ] Xu et al.…”

Section: Application Of Icofs In Energy Devicesmentioning

confidence: 99%

Ionic Covalent Organic Frameworks for Energy Devices

et al. 2021

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Covalent organic frameworks (COFs) are a class of porous crystalline materials whose facile preparation, functionality, and modularity have led to their becoming powerful platforms for the development of molecular devices in many fields of (bio)engineering, such as energy storage, environmental remediation, drug delivery, and catalysis. In particular, ionic COFs (iCOFs) are highly useful for constructing energy devices, as their ionic functional groups can transport ions efficiently, and the nonlabile and highly ordered all‐covalent pore structures of their backbones provide ideal pathways for long‐term ionic transport under harsh electrochemical conditions. Here, current research progress on the use of iCOFs for energy devices, specifically lithium‐based batteries and fuel cells, is reviewed in terms of iCOF backbone‐design strategies, synthetic approaches, properties, engineering techniques, and applications. iCOFs are categorized as anionic COFs or cationic COFs, and how each of these types of iCOFs transport lithium ions, protons, or hydroxides is illustrated. Finally, the current challenges to and future opportunities for the utilization of iCOFs in energy devices are described. This review will therefore serve as a useful reference on state‐of‐the‐art iCOF design and application strategies focusing on energy devices.

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“…Recently, covalent organic frameworks (COFs), a class of crystalline porous organic polymer, have received distinct attention as alternative electrochromic materials [26–30] . COFs with well‐defined two‐dimensional (2D) or three‐dimensional (3D) framework structures have been widely applied in diverse fields starting from gas storage, separation, water purification, sensing, catalysis to energy storage [17,31–39] . Unlike MOFs, COFs are electrochemically highly stable due to the robust covalent linkages with π–π stacking structures.…”

Section: Introductionmentioning

confidence: 99%

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

Sarkar

Dutta

Patra

2021

Chemistry An Asian Journal

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The electrochromic materials have received immense attention for the fabrication of smart optoelectronic devices. The alteration of the redox states of the electroactive functionalities results in the color change in response to electrochemical potential. Even though transition metal oxides, redox‐active small organic molecules, conducting polymers, and metallopolymers are known for electrochromism, advanced materials demonstrating multicolor switching with fast response time and high durability are of increasing demand. Recently, two‐dimensional covalent organic frameworks (2D COFs) have been demonstrated as electrochromic materials due to their tunable redox functionalities with highly ordered structure and large specific surface area facilitating fast ion transport. Herein, we have discussed the mechanistic insights of electrochromism in 2D COFs and their structure‐property relationship in electrochromic performance. Furthermore, the state‐of‐the‐art knowledge for developing the electrochromic 2D COFs and their potential application in next‐generation display devices are highlighted.

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Covalent organic framework based lithium-ion battery: Fundamental, design and characterization

Cited by 114 publications

References 98 publications

Vertically Aligned n-Type Silicon Nanowire Array as a Free-Standing Anode for Lithium-Ion Batteries

Vertically Aligned n-Type Silicon Nanowire Array as a Free-Standing Anode for Lithium-Ion Batteries

Ionic Covalent Organic Frameworks for Energy Devices

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

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