HARDLY GRAPHITIZABLE CARBON, MIXED CARBON POWDER, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

Non-graphitizable carbon, a negative electrode for a lithium-ion secondary battery, and a lithium-ion secondary battery are disclosed. In the non-graphitizable carbon, a strain ε determined by a method in which an X-ray diffraction pattern is subjected to Rietveld analysis to obtain a profile and the profile is used to determine a strain ε by a Williamson-Hall method is 0.081 to 0.120, and a lattice plane distance d002 corresponding to 002 reflection as obtained by subjecting the X-ray diffraction pattern to Rietveld analysis is 0.360 to 0.370 nm.