US 11,858,827 B2
Preparation method of a nanotube hierarchically structured lithium titanate and use and product thereof
Xu Jin, Beijing (CN); Jianming Li, Beijing (CN); He Liu, Beijing (CN); Hang Jiao, Beijing (CN); Xiaoqi Wang, Beijing (CN); Liang Sun, Beijing (CN); and Xiaodan Liu, Beijing (CN)
Assigned to PETROCHINA COMPANY LIMITED, Beijing (CN)
Filed by PETROCHINA COMPANY LIMITED, Beijing (CN)
Filed on Aug. 29, 2019, as Appl. No. 16/556,224.
Claims priority of application No. 201811002667.X (CN), filed on Aug. 30, 2018.
Prior Publication US 2020/0071184 A1, Mar. 5, 2020
Int. Cl. C01G 23/00 (2006.01); C01D 15/00 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C01G 23/005 (2013.01) [C01D 15/00 (2013.01); C01G 23/001 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A preparation method of a nanotube hierarchically structured lithium titanate, wherein the method comprises the steps of:
S1. dispersing a titanium source into an aqueous solution containing lithium hydroxide and hydrogen peroxide and stirring to obtain a mixed solution;
S2. subjecting the mixed solution obtained in step S1 to a reaction by heating to obtain a precursor having a nanowire structure;
S3. subjecting the precursor having a nanowire structure obtained in step S2 to separation and drying;
S4. subjecting the precursor having a nanowire structure after separation and drying to a low-temperature annealing treatment; and
S5. subjecting the precursor having a nanowire structure after the low-temperature annealing treatment to a liquid thermal reaction to obtain the nanotube hierarchically structured lithium titanate.