scholarly journals Horizontally arranged zinc platelet electrodeposits modulated by fluorinated covalent organic framework film for high-rate and durable aqueous zinc ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zedong Zhao ◽  
Rong Wang ◽  
Chengxin Peng ◽  
Wuji Chen ◽  
Tianqi Wu ◽  
...  
Keyword(s):  
Low Cost ◽  
Protective Layer ◽  
Lithium Ion ◽  
Zinc Ion ◽  
High Rate ◽  
Covalent Organic Framework ◽  
Platelet Morphology ◽  
Areal Capacity ◽  
Intrinsic Safety ◽  
Organic Framework

AbstractRechargeable aqueous zinc-ion batteries (RZIBs) provide a promising complementarity to the existing lithium-ion batteries due to their low cost, non-toxicity and intrinsic safety. However, Zn anodes suffer from zinc dendrite growth and electrolyte corrosion, resulting in poor reversibility. Here, we develop an ultrathin, fluorinated two-dimensional porous covalent organic framework (FCOF) film as a protective layer on the Zn surface. The strong interaction between fluorine (F) in FCOF and Zn reduces the surface energy of the Zn (002) crystal plane, enabling the preferred growth of (002) planes during the electrodeposition process. As a result, Zn deposits show horizontally arranged platelet morphology with (002) orientations preferred. Furthermore, F-containing nanochannels facilitate ion transport and prevent electrolyte penetration for improving corrosion resistance. The FCOF@Zn symmetric cells achieve stability for over 750 h at an ultrahigh current density of 40 mA cm−2. The high-areal-capacity full cells demonstrate hundreds of cycles under high Zn utilization conditions.

scholarly journals Horizontally Arranged Zinc Platelet Electrodeposits Modulated by Fluorinated Covalent Organic Framework Film for High-Rate and Durable Aqueous Zinc Ion Batteries

2021 ◽  
Author(s):  
Zaiping Guo ◽  
Zedong Zhao ◽  
Rong Wang ◽  
Chengxin Peng ◽  
Wuji Chen ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Protective Layer ◽  
Lithium Ion ◽  
Zinc Ion ◽  
High Rate ◽  
High Mass ◽  
Side Reactions ◽  
Zinc Anode ◽  
Covalent Organic Framework ◽  
Organic Framework

Abstract Rechargeable aqueous zinc-ion batteries (RZIBs) provide a promising complementarity to the existing lithium-ion batteries due to their low cost, non-toxicity and intrinsic safety. However, Zn anodes suffer from zinc dendrite growth and continuous unfavorable side reactions, resulting in low Coulombic efficiency (CE) and severe capacity decay. Here, we develop an ultrathin, fluorinated two-dimensional porous covalent organic framework (FCOF) film as a protective layer on the Zn surface to address these issues. The strong interaction between fluorine (F) in FCOF and Zn reduces the surface energy of the Zn (002) crystal plane and regulates planar growth of zinc anode materials. As a result, Zn deposits underneath FCOF films show parallel platelet morphology with (002) planar orientations preferred. Furthermore, F-containing nanochannels facilitate the de-solvation of hydrated Zn ions and prevent electrolyte penetration, thus retarding corrosion of Zn. Such unique FCOF films prolonged the Zn symmetric cell lifespan to over 1700 h, which is 13 times longer than the cells without protection (125 h). The assembled full cells demonstrate a cycle life of over 250 cycles at 3 mAcm-2 under practical conditions, including lean electrolyte (12 μLmAh-1), limited Zn excess (only 1×excess), and a high mass loading of MnO2 cathode (16 mgcm-2). This work provides a new perspective for the realization of planar deposition of zinc metal anodes for developing high performance Zn-based batteries.

A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices

2020 ◽  
Vol 142 (46) ◽  
pp. 19570-19578
Author(s):  
Minghao Yu ◽  
Naisa Chandrasekhar ◽  
Ramya Kormath Madam Raghupathy ◽  
Khoa Hoang Ly ◽  
Haozhe Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Rate ◽  
Two Dimensional ◽  
Energy Storage Devices ◽  
Ion Energy ◽  
Storage Devices ◽  
Covalent Organic Framework ◽  
Organic Framework

Cationic covalent organic framework based all-solid-state electrolytes

2020 ◽  
Vol 4 (4) ◽  
pp. 1164-1173 ◽  
Author(s):  
Zhen Li ◽  
Zhi-Wei Liu ◽  
Zhen-Jie Mu ◽  
Chen Cao ◽  
Zeyu Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid Electrolytes ◽  
Lithium Ion ◽  
Ion Conductivity ◽  
Li Ion Battery ◽  
Covalent Organic Framework ◽  
Li Ion ◽  
Lithium Ion Conductivity ◽  
Organic Framework

Two new imidazolium-based cationic COFs were synthesized and employed as all-solid electrolytes, and exhibited high lithium ion conductivity at high temperature. The assembled Li-ion battery displays preferable battery performance at 353 K.

A Truxenone‐based Covalent Organic Framework as an All‐Solid‐State Lithium‐Ion Battery Cathode with High Capacity

2020 ◽  
Vol 132 (46) ◽  
pp. 20565-20569
Author(s):  
Xiye Yang ◽  
Yiming Hu ◽  
Nathan Dunlap ◽  
Xubo Wang ◽  
Shaofeng Huang ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Battery ◽  
High Capacity ◽  
Lithium Ion ◽  
Covalent Organic Framework ◽  
Organic Framework

Lithium ion diffusion mechanism in covalent organic framework based solid state electrolyte

2019 ◽  
Vol 21 (19) ◽  
pp. 9883-9888 ◽  
Author(s):  
Kecheng Zhang ◽  
Bingkai Zhang ◽  
Mouyi Weng ◽  
Jiaxin Zheng ◽  
Shunning Li ◽  
...  
Keyword(s):  
Solid State ◽  
Diffusion Mechanism ◽  
Lithium Ion ◽  
One Dimension ◽  
Ion Diffusion ◽  
Solid State Electrolyte ◽  
Covalent Organic Framework ◽  
System P ◽  
Lithium Ion Diffusion ◽  
Organic Framework

Mechanism of Li-ions diffusion in a one-dimension tunnel of COF-5 and structure of the COF-5@LiClO4@THF system.

scholarly journals Surface controlled pseudo-capacitive reactions enabling ultra-fast charging and long-life organic lithium ion batteries

2020 ◽  
Vol 4 (8) ◽  
pp. 4179-4185 ◽  
Author(s):  
Kamran Amin ◽  
Jianqi Zhang ◽  
Hang-Yu Zhou ◽  
Ruichiao Lu ◽  
Miao Zhang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Covalent Organic Framework ◽  
Fast Charging ◽  
Long Life ◽  
Organic Framework

To develop ultra-fast charging and long-life lithium ion batteries, a surface-controlled pseudo-capacitive reaction mechanism for organic lithium ion batteries is developed based on a coaxial nanocomposite of an active anthraquinone-based covalent organic framework and CNTs.

scholarly journals Achieving of High Density/Utilization of Active Groups via Synergic Integration of C=N and C=O Bonds for Ultra-Stable and High-Rate Lithium-Ion Batteries

Research ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Tao Sun ◽  
Zong-Jun Li ◽  
Xin-Bo Zhang
Keyword(s):  
Electrode Materials ◽  
High Current Density ◽  
Low Cost ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Environmental Friendliness ◽  
Practical Applications ◽  
Organic Electrode

Organic electrode materials are receiving ever-increasing research interest due to their combined advantages, including resource renewability, low cost, and environmental friendliness. However, their practical applications are still terribly plagued by low conductivity, poor rate capability, solubility in electrolyte, and low density/utilization of active groups. In response, herein, as a proof-of-concept experiment, C=N and C=O bonds are synergically integrated into the backbone of pentacene to finely tune the electronic structures of pentacene. Unexpectedly, the firstly obtained unique 5,7,11,14-tetraaza-6,13-pentacenequinone/reduced graphene oxide (TAPQ/RGO) composite exhibits superior electrochemical performances, including an ultra-stable cycling stability (up to 2400 cycles) and good rate capability (174 mAh g−1 even at a high current density of 3.2 A g−1), which might be attributed to the abundant active groups, π-conjugated molecular structure, leaf-like morphology, and the interaction between TAPQ and graphene.

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