JP7133599B2 - 異種元素ドープ多孔質炭素体の製造方法、及びこれにより製造される異種元素ドープ多孔質炭素体 - Google Patents
異種元素ドープ多孔質炭素体の製造方法、及びこれにより製造される異種元素ドープ多孔質炭素体 Download PDFInfo
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Description
<実施例1>
<実施例2>
金属である白金(Pt)を含有する炭素前駆体粉末としてテトラキス(トリフェニルホスフィン)白金(0)(Tetrakis(triphenylphosphine)platinum(0))を準備した。約80℃で加熱攪拌を介して液体状態の前駆体溶融液に製造した。
<試験例1>
実施例1及び実施例2によって製造されるリンドープ多孔質炭素体の形態及び構造のモルフォロジーをSEM写真とTEM写真によって確認することができる。
図5はPCB-500及びPCB-1000のXRD(X-ray diffraction)パターンをグラフで表したものである。図5を参照すると、PCB-500及びPCB-1000の両方とも約24°及び43°でピークが現れている。これは、それぞれ黒鉛の(002)及び(100)平面と関連しているが、このピークは広くて非結晶構造を示す。
図6aはPCB-500の多孔性を確認するためにN2吸着-脱着等温線をグラフで表したものであり、マイクロポアにおける単一層のN2吸着により初期のP/P0で吸着量が増加したことを示す。また、高いP/P0でのN2及びH3-typeヒステリシスループの連続吸着はメソポア及びマクロポアの存在を示唆する。図6aを参照すると、PCB-500のBET比表面積は203.33m2/gであり、BJH方法によって計算された細孔サイズ分布曲線はメソ-マクロ階層的細孔構造を持っていることを示す。
X線光電子分析法を用いて、リン(P)原子が炭素(C)骨格にドープされたかを試してみた。
ナトリウムイオン電池における陰極活物質による電気化学的性能は、まず、0.01~3.0V(V vs Na+/Na)間の0.2mV/sの走査速度で循環電圧電流法(CV)によって調査した。
I=avb
I(V)=k1v+k2v1/2
PCB-500及びPCB-1000のサイクリング性能特性を様々な電流密度に応じてさらに分析してみた。
本試験例では、実施例3によって製造される白金ドープカーボンナノ粒子が凝集した白金ドープ多孔質炭素体の材料特性及び電気化学特性を試験してみた。
Claims (4)
- 金属及び非金属の中から選ばれた1種以上の異種元素を含有する炭素前駆体粉末を溶融して前駆体溶融液を製造する第1ステップと、
前記前駆体溶融液に一対の金属ワイヤーを配置する第2ステップと、
前記金属ワイヤーに電源を印加してプラズマ放電させ、マイクロポアを有しながら前記異種元素がドープされたカーボンナノ粒子が形成及び凝集されてメソ-マクロ階層的細孔構造を有する多孔質炭素体を形成する第3ステップとを含んでなり、
前記炭素前駆体は、トリフェニルホスフィン構造を含む化合物であり、
前記カーボンナノ粒子は、前記炭素前駆体の炭素に前記異種元素が結合されることにより、異種元素がドープされながら非結晶構造に形成されて活性サイト(active site)が増加することを特徴とする、異種元素ドープ多孔質炭素体の製造方法。 - 前記多孔質炭素体を500~1,000℃で熱処理する第4ステップをさらに含むことを特徴とする、請求項1に記載の異種元素ドープ多孔質炭素体の製造方法。
- 前記多孔質炭素体の前記異種元素ドーピング量が1~10at%であることを特徴とする、請求項1に記載の異種元素ドープ多孔質炭素体の製造方法。
- 前記異種元素のうち、前記金属は、白金(Pt)、パラジウム(Pd)、金(Au)、ルテニウム(Ru)、イリジウム(Ir)、スズ(Sn)、アルミニウム(Al)、リチウム(Li)、ナトリウム(Na)、銅(Cu)、亜鉛(Zn)、マグネシウム(Mg)、コバルト(Co)、マンガン(Mn)、ニッケル(Ni)及び鉄(Fe)のうちの少なくとも1種であり、
前記非金属は、リン(P)、硫黄(S)、セレン(Se)、ホウ素(B)、窒素(N)及びケイ素(Si)のうちの少なくとも1種であることを特徴とする、請求項1に記載の異種元素ドープ多孔質炭素体の製造方法。
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JP2005272177A (ja) | 2004-03-23 | 2005-10-06 | Ideal Star Inc | アーク放電による内包炭素クラスタの製造方法 |
WO2012121031A1 (ja) | 2011-03-04 | 2012-09-13 | 国立大学法人 熊本大学 | 含窒素炭素化合物 |
JP2020038831A (ja) | 2018-09-03 | 2020-03-12 | 学校法人近畿大学 | 空気電池の酸素電極触媒およびその製造方法 |
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JP2005272177A (ja) | 2004-03-23 | 2005-10-06 | Ideal Star Inc | アーク放電による内包炭素クラスタの製造方法 |
WO2012121031A1 (ja) | 2011-03-04 | 2012-09-13 | 国立大学法人 熊本大学 | 含窒素炭素化合物 |
JP2020038831A (ja) | 2018-09-03 | 2020-03-12 | 学校法人近畿大学 | 空気電池の酸素電極触媒およびその製造方法 |
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