Hollow hybrid microspheres have found great potential in different areas, such as drug delivery, nanoreactors, photonics and lithium-ion batteries. Here, we report a simple and scalable approach to construct high-quality hollow hybrid micro spheres through a previously unexplored growth mechanism. Starting from uniform solid microspheres with low crystallinity, we identified that a hollowing process can happen through the progressive inward crystallization process initiated on the particle surface: the gradual encroachment of the crystallization frontline toward the core leads to the depletion of the center and forms the Central cavity. We showed that such a synthetic: platform was versatile and can be applicable for a large variety of materials. By using the production of Li4Ti5O12-carbon hollow hybrid micro spheres as, an example, we demonstrated that high-performance anode matetials could be achieved through synthesis and structure control. We expect that our findings offer new perspectives in different areas ranging from materials chemistry, energy storage devices, catalysis, to drug delivery.
1.Chinese Acad Sci, Inst Chem, Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China