HIGH VOLTAGE LITHIUM ION POSITIVE ELECTRODE MATERIAL
A positive electrode material has a nominal stoichiometric formula of Li_(1+2/y)Co_(1-x-y-z-d)Si_zFe_xM_yM′_d(PO_4)_(1+y/2). M is at least one kind of trivalent cation selected among Cr, Ti, Al, Mn, Ni, V, Sc, La and/or Ga; M′ is at least one kind of divalent cation selected among Mn, Ni, Zn, Sr, Cu...
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Format | Patent |
Language | English Korean |
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30.11.2015
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Abstract | A positive electrode material has a nominal stoichiometric formula of Li_(1+2/y)Co_(1-x-y-z-d)Si_zFe_xM_yM′_d(PO_4)_(1+y/2). M is at least one kind of trivalent cation selected among Cr, Ti, Al, Mn, Ni, V, Sc, La and/or Ga; M′ is at least one kind of divalent cation selected among Mn, Ni, Zn, Sr, Cu, Ca and/or Mg; y satisfies 0<y<=0.10; and x satisfies 0<=x<=0.2. Using double composition exchange of LiCoPO_4 allows discharge capacity retention of the LiCoPO_4 which is monosubstituted with Fe-, while increasing about 100-130 mAh/g of discharge capacity. Additional composition exchange of including Si increases the cycle life and remarkably improves coulombic efficiency up to 97 to 100% in the cycle rate of C/3.
양극 물질은 LiCoSiFeMM'(PO)의 공칭 화학양론을 갖고, 여기에서 상기 M은 Cr, Ti, Al, Mn, Ni, V, Sc, La 및/또는 Ga 중에서 선택된 적어도 1종의 3가 양이온이고, 상기 M'은 Mn, Ni, Zn, Sr, Cu, Ca 및/또는 Mg 중에서 선택된 적어도 1종의 2가 양이온이고, y는 0 < y ≤ 0.10의 범위 내이고, x는 0 ≤ x ≤ 0.2의 범위 내이다. LiCoPO에 대한 이중의 조성 변형을 사용하는 것은 단일 Fe-치환된 LiCoPO의 방전 보존용량을 유지하면서 ~ 100 mAh/g 내지 약 130 mAh/g의 방전 용량을 증가시킨다. Si를 포함하도록 하는 추가의 조성 변형은 주기 수명을 증가시키고 C/3 주기율에서 쿨롱 효율을 97 내지 100%로 크게 개선시킨다. |
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AbstractList | A positive electrode material has a nominal stoichiometric formula of Li_(1+2/y)Co_(1-x-y-z-d)Si_zFe_xM_yM′_d(PO_4)_(1+y/2). M is at least one kind of trivalent cation selected among Cr, Ti, Al, Mn, Ni, V, Sc, La and/or Ga; M′ is at least one kind of divalent cation selected among Mn, Ni, Zn, Sr, Cu, Ca and/or Mg; y satisfies 0<y<=0.10; and x satisfies 0<=x<=0.2. Using double composition exchange of LiCoPO_4 allows discharge capacity retention of the LiCoPO_4 which is monosubstituted with Fe-, while increasing about 100-130 mAh/g of discharge capacity. Additional composition exchange of including Si increases the cycle life and remarkably improves coulombic efficiency up to 97 to 100% in the cycle rate of C/3.
양극 물질은 LiCoSiFeMM'(PO)의 공칭 화학양론을 갖고, 여기에서 상기 M은 Cr, Ti, Al, Mn, Ni, V, Sc, La 및/또는 Ga 중에서 선택된 적어도 1종의 3가 양이온이고, 상기 M'은 Mn, Ni, Zn, Sr, Cu, Ca 및/또는 Mg 중에서 선택된 적어도 1종의 2가 양이온이고, y는 0 < y ≤ 0.10의 범위 내이고, x는 0 ≤ x ≤ 0.2의 범위 내이다. LiCoPO에 대한 이중의 조성 변형을 사용하는 것은 단일 Fe-치환된 LiCoPO의 방전 보존용량을 유지하면서 ~ 100 mAh/g 내지 약 130 mAh/g의 방전 용량을 증가시킨다. Si를 포함하도록 하는 추가의 조성 변형은 주기 수명을 증가시키고 C/3 주기율에서 쿨롱 효율을 97 내지 100%로 크게 개선시킨다. |
Author | JAN L. ALLEN JEFFERY B. WOLFENSTINE T. RICHARD JOW JOSHUA L. ALLEN SAMUEL A. DELP III |
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Snippet | A positive electrode material has a nominal stoichiometric formula of Li_(1+2/y)Co_(1-x-y-z-d)Si_zFe_xM_yM′_d(PO_4)_(1+y/2). M is at least one kind of... |
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SubjectTerms | BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY |
Title | HIGH VOLTAGE LITHIUM ION POSITIVE ELECTRODE MATERIAL |
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