[논문]Pyro-synthesis of Na2FeP2O7 Nano-plates as Cathode for Sodium-ion Batteries with Long Cycle Stability

Song, Jinju; Yang, Juhyun; Alfaruqi, Muhammad Hilmy; Park, Wangeun; Park, Sohyun; Kim, Sungjin; Jo, Jeonggeun; Kim, Jaekook

doi:10.4191/kcers.2016.53.4.406

[국내논문] Pyro-synthesis of Na2FeP2O7 Nano-plates as Cathode for Sodium-ion Batteries with Long Cycle Stability 원문보기

한국세라믹학회지 = Journal of the Korean Ceramic Society, v.53 no.4, 2016년, pp.406 - 410

Song, Jinju (Department of Materials Science and Engineering, Chonnam National University) , Yang, Juhyun (Department of Materials Science and Engineering, Chonnam National University) , Alfaruqi, Muhammad Hilmy (Department of Materials Science and Engineering, Chonnam National University) , Park, Wangeun (Department of Materials Science and Engineering, Chonnam National University) , Park, Sohyun (Department of Materials Science and Engineering, Chonnam National University) , Kim, Sungjin (Department of Materials Science and Engineering, Chonnam National University) , Jo, Jeonggeun (Department of Materials Science and Engineering, Chonnam National University) , Kim, Jaekook (Department of Materials Science and Engineering, Chonnam National University)

Abstract ▼ AI-Helper

Carbon-coated sodium iron pyrophosphate ($Na_2FeP_2O_7$) was prepared by a simple and low-cost pyro-synthesis route for further use as the cathode for Na-ion batteries. The X-ray diffraction (XRD) pattern of the sample annealed at $650^{\circ}C$ confirmed the pure triclinic phase of $Na_2FeP_2O_7$. Electron microscopy studies revealed a cross linked plate shape morphology of the $Na_2FeP_2O_7$ sample. When tested for application in Na-ion battery, the $Na_2FeP_2O_7$ cathode showed two redox pairs in the potential window of 2.0-4.0 V. The cathode registered initial discharge and charge capacities of 80.85 and 90 mAh/g, respectively, with good cycling performance.

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제안 방법

In this work, we synthesized triclinic Na₂FeP₂O₇ powders with high crystallinity by a one-step pyro-synthetic strategy using a polyol medium at a low temperature within a few minutes of reaction time in open-air condition. The polyol medium acts as a primary fuel to induce flame that can provide high thermal energy and carbon source.

대상 데이터

Na2FeP2O7 powders were prepared by a polyol-assisted pyro-synthetic method using sodium acetate (CH3COONa, 99.0%. Sigma Aldrich), iron acetate (Fe (CO2CH3 )2, 99.99%, Sigma Aldrich), and phosphoric acid (H3PO4, ≥ 85%, Daejung).
, Ohtaku, Tokyo, Japan). The fabricated cathode consisted of active materials with 30% conductive carbon (Ketjen black) and teflonized acethylene black (TAB). The mixture was pressed onto a stainless steel mesh and dried under a vacuum at 120℃ for 12 h.
A 2032 coin type cell consisting of the cathode and a sodium metal anode separated by glass fiber was fabricated in an Ar-filled glove box and aged for 12 h before the electrochemical measurements. The electrolyte employed was 1M NaClO₄ in propylene carbonate (PC). The assembled cells were tested at 0.

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연합인증

[국내논문] Pyro-synthesis of Na2FeP2O7 Nano-plates as Cathode for Sodium-ion Batteries with Long Cycle Stability 원문보기

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[국내논문] Pyro-synthesis of Na2FeP2O7 Nano-plates as Cathode for Sodium-ion Batteries with Long Cycle Stability 원문보기

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