Lee, Juyun Cho, Sung Ho Jang, Jeong Min Woo, Seung Hee Kang, Yun Chan Kim, Seon Joon 2025-05-22T06:30:40Z 2025-05-22T06:30:40Z 2025-05-21 2025-09 2366-9608 https://pubs.kist.re.kr/handle/201004/152490 MXenes, a class of 2D transition metal carbides and nitrides, exhibit exceptional electrical conductivity and solution dispersibility, making them promising materials for various applications. However, their long-term stability remains a critical challenge due to oxidation in aqueous dispersions. While the transformation of these dispersions into water-redispersible dry monoliths is highly desirable, achieving this has proven difficult. This study introduces a facile approach to enhance the redispersion yield of dried MXene monoliths by incorporating trace amounts of metal cations (Li+, Mg2+, and Al3+) into aqueous dispersions prior to lyophilization. These cations intercalate between MXene sheets, acting as atomic pillars that inhibit face-to-face restacking and facilitate water infiltration during redispersion. Systematic investigations reveal that optimal cation concentrations significantly improve redispersion efficiency without inducing flocculation, achieving yields of up to 100% for Li+-modified MXenes. Characterization of redispersed MXene nanosheets confirms preserved morphology and structural integrity. Furthermore, compared to the pristine MXene counterparts, MXene films made from cation-aided redispersions show higher electrical conductivity and electromagnetic interference shielding performances. This simple yet effective strategy addresses key challenges in MXene storage and processing, enabling reliable solution-based fabrication for energy storage, sensing, and electronic applications. English WILEY-V C H VERLAG GMBH Achieving Full Redispersion of Dried MXene Monoliths via Trace Metal Cation Intercalation Article 10.1002/smtd.202500383 1 Small Methods, v.9, no.9 Small Methods 9 9 Y scie scopus 001479883900001 2-s2.0-105004200417 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article; Early Access STABILITY SURFACE TI3C2TX MXENE metal cations MXenes redispersion intercalation lyophilization