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https://doi.org/10.1007/s40820-020-00587-y
DC Field | Value | |
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dc.title | From Micropores to Ultra-micropores inside Hard Carbon: Toward Enhanced Capacity in Room-/Low-Temperature Sodium-Ion Storage | |
dc.contributor.author | Yang, Jinlin | |
dc.contributor.author | Wang, Xiaowei | |
dc.contributor.author | Dai, Wenrui | |
dc.contributor.author | Lian, Xu | |
dc.contributor.author | Cui, Xinhang | |
dc.contributor.author | Zhang, Weichao | |
dc.contributor.author | Zhang, Kexin | |
dc.contributor.author | Lin, Ming | |
dc.contributor.author | Zou, Ruqiang | |
dc.contributor.author | Loh, Kian Ping | |
dc.contributor.author | Yang, Quan-Hong | |
dc.contributor.author | Chen, Wei | |
dc.date.accessioned | 2022-10-12T07:57:35Z | |
dc.date.available | 2022-10-12T07:57:35Z | |
dc.date.issued | 2021-03-30 | |
dc.identifier.citation | Yang, Jinlin, Wang, Xiaowei, Dai, Wenrui, Lian, Xu, Cui, Xinhang, Zhang, Weichao, Zhang, Kexin, Lin, Ming, Zou, Ruqiang, Loh, Kian Ping, Yang, Quan-Hong, Chen, Wei (2021-03-30). From Micropores to Ultra-micropores inside Hard Carbon: Toward Enhanced Capacity in Room-/Low-Temperature Sodium-Ion Storage. Nano-Micro Letters 13 (1) : 98. ScholarBank@NUS Repository. https://doi.org/10.1007/s40820-020-00587-y | |
dc.identifier.issn | 2311-6706 | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/232339 | |
dc.description.abstract | Highlights: Hard-carbon anode dominated with ultra-micropores (< 0.5 nm) was synthesized for sodium-ion batteries via a molten diffusion–carbonization method.The ultra-micropores dominated carbon anode displays an enhanced capacity, which originates from the extra sodium-ion storage sites of the designed ultra-micropores.The thick electrode (~ 19 mg cm?2) with a high areal capacity of 6.14 mAh cm?2 displays an ultrahigh cycling stability and an outstanding low-temperature performance. Abstract: Pore structure of hard carbon has a fundamental influence on the electrochemical properties in sodium-ion batteries (SIBs). Ultra-micropores (< 0.5 nm) of hard carbon can function as ionic sieves to reduce the diffusion of slovated Na+ but allow the entrance of naked Na+ into the pores, which can reduce the interficial contact between the electrolyte and the inner pores without sacrificing the fast diffusion kinetics. Herein, a molten diffusion–carbonization method is proposed to transform the micropores (> 1 nm) inside carbon into ultra-micropores (< 0.5 nm). Consequently, the designed carbon anode displays an enhanced capacity of 346 mAh g?1 at 30 mA g?1 with a high ICE value of ~ 80.6% and most of the capacity (~ 90%) is below 1 V. Moreover, the high-loading electrode (~ 19 mg cm?2) exhibits a good temperature endurance with a high areal capacity of 6.14 mAh cm?2 at 25 °C and 5.32 mAh cm?2 at ? 20 °C. Based on the in situ X-ray diffraction and ex situ solid-state nuclear magnetic resonance results, the designed ultra-micropores provide the extra Na+ storage sites, which mainly contributes to the enhanced capacity. This proposed strategy shows a good potential for the development of high-performance SIBs.[Figure not available: see fulltext.]. © 2021, The Author(s). | |
dc.publisher | Springer Science and Business Media B.V. | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Scopus OA2021 | |
dc.subject | Carbon anode | |
dc.subject | Extra sodium-ion storage sites | |
dc.subject | High areal capacity | |
dc.subject | Low-voltage capacity | |
dc.subject | Ultra-micropores | |
dc.type | Article | |
dc.contributor.department | CHEMISTRY | |
dc.contributor.department | OFFICE OF THE SR DY PRESIDENT & PROVOST | |
dc.description.doi | 10.1007/s40820-020-00587-y | |
dc.description.sourcetitle | Nano-Micro Letters | |
dc.description.volume | 13 | |
dc.description.issue | 1 | |
dc.description.page | 98 | |
Appears in Collections: | Staff Publications Elements |
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