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In this work, a one-step solid-phase sintering process via TiO2 and Li2CO3 under an argon atmosphere, with ultra-fine titanium powder as the modifying agent, was used to prepare a nano-sized Li4Ti5O12/Ti composite (denoted as LTO–Ti) at 800 °C. The introduction of ultra-fine metal titanium powder played an important role. First, X-ray photoelectron spectroscopy demonstrates that Ti4+ was partially...