Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-Situ Exfoliation Strategy for High-Performance Zn-Ion Hybrid Capacitors

He, Hongcheng; Lian, Ji‐Chun; Chen, Changmiao; Xiong, Qiaotian; Li, Cheng Chao; Zhang, Ming

doi:10.2139/ssrn.3979514

Cited by 1 publication

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“…Functional groups in BP_CONH5 boosted the chemical adsorption of Zn 2+ 36,37 . Appealing properties of zincophilic materials are commonly used in zinc ion‐based batteries and energy devises 38‐40 …”

Section: Resultsmentioning

confidence: 99%

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Plasticizer for controlling single‐walled carbon nanotube fibers and zincophilic sites of microfiber supercapacitor

Kim

Jin

Lee

et al. 2022

Intl J of Energy Research

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In the past few decades, single-walled carbon nanotube (SWCNT) fibers have been considered for various applications, from aerospace to electronics including flexible devices. Here, we report an effective way of controlling the viscosity of the liquid crystal SWCNT phases for fiber spinning. By applying Tris(hydroxymethyl)aminomethane (THA)-functionalization to single-walled carbon nanotubes (SWCNT_CONH), we enhanced the free volume of individual SWCNTs, which synergistically affected the formation of nematic liquid crystal phases. As a result, we were able to precisely control the viscosity and phase transformation of the nematic liquid crystal phases for fiber spinning. The SWCNT fiber spun from those nematic phases with plasticizer (BP30CONH5; 30 mg/mL of SWCNT_BP with 5 wt% of SWCNT_CONH) exhibited noticeably higher mechanical properties (tensile strength, 1.44 GPa and tensile modulus, 169 GPa) with higher electrical conductivity (1899 S m 2 / kg). These fibers were also exceptionally flexible and showed endurable performance as wearable and flexible electronic electrode devices from welldistributed zincophilic sites (CONH). As an Zn-ion supercapacitor, the SWCNT fiber exhibited linear and volumetric capacitances of 14.33 mF cm À1 and 22.55 F cm À3 at 0.1 mA cm À1 with capacitance retention of 98% after over 30 000 bending tests.

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Section: Resultsmentioning

confidence: 99%

“…36,37 Appealing properties of zincophilic materials are commonly used in zinc ion-based batteries and energy devises. [38][39][40] GCD curves were investigated to clearly examine the electrochemical properties. Figure 5C shows the GCD curves of the SWCNT_CONH5.…”

Section: Application For Zinc Ion Supercapacitormentioning

confidence: 99%