A negative electrode free lithium secondary battery comprising: a positive electrode; a negative electrode current collector having a thickness of 50 μm to 200 μm; and an electrolyte provided between the positive electrode and the negative electrode current collector; wherein the negative electrode current collector has a three-dimensional structure with pores formed therein; the lithium secondary battery is configured for lithium ions to migrate from the positive electrode to form lithium metal on the negative electrode current collector by charging of the battery, thereby forming a negative electrode; and the positive electrode comprises a lithium metal compound represented by any one of the following Chemical Formulae 1 to 8: [Chemical Formula 1] Li 2 Ni 1-a M 1 a O 2 wherein a is 0≤a<1, and M 1 is one or more types of elements selected from Mn, Fe, Co, Cu, Zn, Mg and Cd; [Chemical Formula 2] Li 2+b Ni 1-c M 2 c O 2+d wherein -0.5≤b<0.5, 0≤c≤1, 0≤d<0.3, and M 2 is one or more types of elements selected from P, B, C, Al, Sc, Sr, Ti, V, Zr, Mn, Fe, Co, Cu, Zn, Cr, Mg, Nb, Mo and Cd; [Chemical Formula 3] LiM 3 e Mn 1-e O 2 wherein e is 0≤e<0.5, and M 3 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 4] Li 2 M 4 O 2 wherein M 4 is one or more elements selected from Cu and Ni; [Chemical Formula 5] Li 3+f Nb 1-g M 5 g S 4-h wherein -0.1≤f≤1, 0≤g≤0.5, -0.1≤h≤0.5, and M 5 is one or more elements selected from Mn, Fe, Co, Cu, Zn, Mg and Cd; [Chemical Formula 6] LiM 6 i Mn 1-i O 2 wherein i is 0.05≤i<0.5, and M 6 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 7] LiM 7 2j Mn 2-2j O 4 wherein j is 0.05≤j<0.5, and M 7 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 8] Li k -M 8 m -N n wherein M 8 represents an alkaline-earth metal, k/(k+m+n) is from 0.10 to 0.40, m/(k+m+n) is from 0.20 to 0.50, and n/(k+m+n) is from 0.20 to 0.50. a positive electrode; a negative electrode current collector having a thickness of 50 μm to 200 μm; and an electrolyte provided between the positive electrode and the negative electrode current collector; wherein the negative electrode current collector has a three-dimensional structure with pores formed therein; the lithium secondary battery is configured for lithium ions to migrate from the positive electrode to form lithium metal on the negative electrode current collector by charging of the battery, thereby forming a negative electrode; and the positive electrode comprises a lithium metal compound represented by any one of the following Chemical Formulae 1 to 8: [Chemical Formula 1] Li 2 Ni 1-a M 1 a O 2 wherein a is 0≤a<1, and M 1 is one or more types of elements selected from Mn, Fe, Co, Cu, Zn, Mg and Cd; [Chemical Formula 2] Li 2+b Ni 1-c M 2 c O 2+d wherein -0.5≤b<0.5, 0≤c≤1, 0≤d<0.3, and M 2 is one or more types of elements selected from P, B, C, Al, Sc, Sr, Ti, V, Zr, Mn, Fe, Co, Cu, Zn, Cr, Mg, Nb, Mo and Cd; [Chemical Formula 3] LiM 3 e Mn 1-e O 2 wherein e is 0≤e<0.5, and M 3 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 4] Li 2 M 4 O 2 wherein M 4 is one or more elements selected from Cu and Ni; [Chemical Formula 5] Li 3+f Nb 1-g M 5 g S 4-h wherein -0.1≤f≤1, 0≤g≤0.5, -0.1≤h≤0.5, and M 5 is one or more elements selected from Mn, Fe, Co, Cu, Zn, Mg and Cd; [Chemical Formula 6] LiM 6 i Mn 1-i O 2 wherein i is 0.05≤i<0.5, and M 6 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 7] LiM 7 2j Mn 2-2j O 4 wherein j is 0.05≤j<0.5, and M 7 is one or more elements selected from Cr, Al, Ni, Mn and Co; [Chemical Formula 8] Li k -M 8 m -N n wherein M 8 represents an alkaline-earth metal, k/(k+m+n) is from 0.10 to 0.40, m/(k+m+n) is from 0.20 to 0.50, and n/(k+m+n) is from 0.20 to 0.50. <EOS>