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나노입자 연구단
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Toward a low-cost high-voltage sodium aqueous rechargeable battery

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Title
Toward a low-cost high-voltage sodium aqueous rechargeable battery
Author(s)
Lee M.H.; Kim S.J.; Chang D.; Kim J.; Moon S.; Oh K.; Park K.-Y.; Seong W.M.; Park H.; Kwon G.; Lee B.; Kisuk Kang
Publication Date
2019-10
Journal
MATERIALS TODAY, v.29, no., pp.26 - 36
Publisher
ELSEVIER SCI LTD
Abstract
Recent discovery of high-concentration electrolyte systems has opened a new avenue toward the high-voltage, safe, and low-cost aqueous rechargeable batteries. However, the need for generally high-cost organic solutes in the high-concentration electrolyte has become another major obstacle. Herein, we revisited all the commonly used low-cost solutes for high-concentration system and discovered that the use of NaClO 4 solute effectively results in a wide electrochemical stability window by suppressing water decomposition and induces stable solid-electrolyte interphase (SEI) layer formation without involving the reduction of salt anions. The SEI layer, composed of Na 2 CO 3 and Na–O compounds including NaOH, guarantees the excellent electrochemical storage stability of the full-cell composed of Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ) cathode and NaTi 2 (PO 4 ) 3 anode for the extended period of time. This new class of electrolyte systems provides remarkable cycle stability and a coulombic efficiency of ∼99% at 1C for over 200 cycles, which outperforms the state-of-the-art super-concentrated systems based on NaCF 3 SO 3 . 2019 The Authors. Published by Elsevier Ltd.
URI
https://pr.ibs.re.kr/handle/8788114/6852
ISSN
1369-7021
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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