Article
Nanoscience & Nanotechnology
Xiaoying Fan, Peng Chen, Xu Yin, Ruo-Xuan Qi, Chao Yang, Ya-Jun Cheng, Kunkun Guo, Cuirong Liu, Yonggao Xia
Summary: By incorporating PDMS binder into the electrode, the electrode-electrolyte interface of lithium-ion batteries can be stabilized at high voltage, leading to improved cycling performance and rate performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jianwei Xiong, Tianle Zheng, Ya-Jun Cheng, Jialong Sun, Ruiguo Cao, Yonggao Xia
Summary: Increasing the working voltage of cathode by utilizing sulfur is an effective strategy to improve the energy density and cycling stability of lithium-ion batteries. The addition of a tiny amount of sulfur into the electrolyte solution suppresses side reactions and enhances the rate performance of the battery without causing excessive decomposition.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yiyao Xiao, Xiaotang Shi, Tianle Zheng, Ye Yue, Siqi Shi, Ya-Jun Cheng, Yonggao Xia
Summary: Increasing the working voltage of a layered oxide cathode is an efficient way to lift the energy density of lithium-ion batteries, but it can lead to uncontrollable side reactions and excessive electrolyte decomposition. Construction of a high-voltage stable solid-electrolyte interface (SEI) layer is crucial to enhance the electrochemical performance. In this study, trimethylene borate (TMEB) was used as a borate ester additive, which improved the cycling stability of NCM523 cells at 4.5V charging cutoff voltage.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jinhyeok Ahn, Jinsol Im, Hyewon Seo, Sukeun Yoon, Kuk Young Cho
Summary: This study proposes the use of 2,4-difluorobiphenyl (FBP) as a fluorine-based cathode electrolyte interphase (CEI)-forming additive for Ni-rich LiNi0.83Co0.11Mn0.06O2 (NCM83), which enhances cycling stability at high cut-off voltages and promotes the formation of a stable CEI layer on the surface. The results demonstrate the potential of introducing a fluorine component to existing additives for the development of new functional additives in lithium-ion battery applications.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Zhenghua Zhang, Jiugang Hu, Yang Hu, Hongmei Wang, Huiping Hu
Summary: This work investigates the effect of an advanced electrolyte additive on the performance of Ni-rich LiNixCoyMn1-x-yO2/graphite batteries. The results show that the additive induces the formation of robust electrolyte/electrode interphase, significantly improving the cycling performance and reducing the cell impedance. The capacity retention rate of the cells with the additive-based electrolyte can reach 90% after 600 cycles, which is considerably better than that of baseline batteries (70%). Mechanistic studies reveal that the additive suppresses the formation of fragile Li2CO3 and promotes the formation of more stable LiF, LixPOyFz, and additional organic phosphorus species on the electrode surface, thereby preventing cation disorder and irreversible phase transitions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yunjing Cao, Nan Li, Na Li, Wujiu Zhang, Shiyu Liang, Zhidong Hou, Da Lei, Ting Jin, Jian-Gan Wang, Keyu Xie, Chao Shen
Summary: This study systematically reveals the mechanism of electrolyte additive in enhancing the electrochemical performance of Ni-rich layered oxides at high voltage and high temperature. The additive improves the stability of the electrode by strengthening the cathode-electrolyte interface and deactivating reactive oxygen species, enabling the Ni-rich cathode to adapt to deep charging state and highly oxidized environment. The results provide a guide for designing electrolytes for high-voltage and high-temperature Ni-rich LIBs.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Liansheng Li, Jie Wang, Leiting Zhang, Huanhuan Duan, Yuanfu Deng, Guohua Chen
Summary: This study develops a novel strategy of asymmetric polymer matrices design combined with functional additives to address the multiple interfacial challenges faced by high-voltage all-solid-state lithium batteries (ASSLBs). The addition of LiBODFP in the cathode side and LiNO3 in the anode side are revealed to effectively prolong the cycle stability of the ASSLB. The high-voltage LiFe0.5Mn0.5PO4-based ASSLB using the developed asymmetric CSE exhibits superior electrochemical behaviors and high capacity retention.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Jing Zhang, Jiapei Li, Longhao Cao, Wenhua Cheng, Ziyin Guo, Xiuxia Zuo, Chao Wang, Ya-Jun Cheng, Yonggao Xia, Yudai Huang
Summary: In this study, a new approach called surface targeted precise functionalization (STPF) is proposed to enhance the structural stability and electrochemical performance of NCM811 cathode material. The approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane (3-ADMS) and precise deposition of ascorbic acid via an acid-base interaction. This method leads to the formation of an ultra-thin spinel surface layer and a stable cathode-electrolyte interface, improving the electrochemical kinetics and inhibiting crack propagation. This research provides a feasible route to enhance the practical applications of high-energy density lithium-ion battery technology.
Article
Nanoscience & Nanotechnology
Yue Zou, Ke Zhou, Gaopan Liu, Ningbo Xu, Xiaozhen Zhang, Yong Yang, Jing Zhang, Jianming Zheng
Summary: A novel electrolyte additive, 1,2,4-1H-triazole (HTZ), was introduced to enhance the interfacial stability and cycle life of LiNi0.9Co0.05Mn0.05O2 (NCM90). HTZ inhibits thermal decomposition of LiPF6 salt and suppresses HF acidic species, leading to the formation of a compact and dense CEI layer. The NCM90 cells with 0.3% HTZ-added electrolyte retain 86.6% of their original capacity after 150 cycles at 30 degrees C.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jiajun Huang, Tong Yan, Mengli Tao, Weifeng Zhang, Wei Li, Guangli Zheng, Li Du, Zhiming Cui, Xiujun Wang, Shijun Liao, Huiyu Song
Summary: A localized high-concentration electrolyte (LHCE) was designed in this study, which used carbonate as the base solvent, hexafluoroisopropyl methyl ether (HFME) as the diluent, and vinylene carbonate (VC) as the filmogen to achieve a stable solid-solid cyclic process in lithium-sulfur batteries. The use of LHCE significantly improved the cyclic performance and stability of the batteries. Overall, this work provides a universal strategy to enhance the performance of Li-S batteries. Evaluation: 9 points.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Physical
Zhaoyu Sun, Jingwei Zhao, Min Zhu, Jun Liu
Summary: This article summarizes the three interactional issues of high-voltage lithium-ion batteries in commercial electrolytes and proposes solutions and a framework for future research.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jungyoung Ahn, Taeeun Yim
Summary: Introducing allyl phenyl sulfone (APS) functional electrolyte additive can effectively enhance the cycling performance of nickel-rich layered lithium metal oxides at high temperature, leading to improved overall electrochemical performance of a cell.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Jian Wang, Shuang Cheng, Linge Li, Lujie Jia, Jian Wu, Xinrui Li, Qinghua Guan, Huimin Hu, Jing Zhang, Hongzhen Lin
Summary: The morphology and state of the cathode/electrolyte interphase (CEI) layer are modulated by introducing highly active lithium bisfluorosulfonylimide (LiFSI) in the ether-based electrolyte, resulting in metal sulfide electrodes with a uniform and robust CEI layer. These electrodes exhibit higher rate capacity and improved Coulombic efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Zhipeng Jiang, Yu Deng, Jisheng Mo, Qingan Zhang, Ziqi Zeng, Yongtao Li, Jia Xie
Summary: This study proposes a strategy to enhance the high-voltage stability of medium-concentration ether electrolytes by altering the reaction pathway of ether solvents. By employing a 1 M lithium difluoro(oxalato)borate in dimethoxyethane (LiDFOB/DME) electrolyte, a stable organic-inorganic hybrid interface is formed, leading to improved cycling performance in lithium metal batteries. The optimized ether electrolyte demonstrates outstanding cycling performance in practical conditions.
Article
Nanoscience & Nanotechnology
Junda Huang, Yaxiong Yang, Yanxia Liu, Jianmin Ma
Summary: The construction of a stable cathode electrolyte interphase (CEI) is crucial for improving the NCM811 particle structure and interfacial stability through electrolyte engineering. In He's research, lithium hexamethyldisilazide (LiHMDS) is proposed as an electrolyte additive to facilitate the formation of a stable CEI on the NCM811 cathode surface while eliminating H2O and HF in the electrolyte. This approach enhances the cycling performance of the Li||NCM811 battery to 1000 or 500 cycles with a 4.5 V cut-off voltage at 25 or 60 degrees C.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyan Wang, Ya-Jun Cheng, Suzhe Liang, Qing Ji, Jin Zhu, Yonggao Xia
Summary: Ultrafine SnO2/Sn nanoparticles encapsulated into an adjustable meso-/macroporous carbon matrix have been successfully fabricated using the in situ SiOx sacrificial strategy. Controlling the void space improves the accessibility of the SnO2/Sn to the electrolyte solution and accommodates the mechanical stress caused by volume change. The carbon matrix structure exhibits excellent electrochemical performance during repeated cycling.
Article
Nanoscience & Nanotechnology
Jingbo Song, Kaisi Liao, Jia Si, Chuanli Zhao, Junping Wang, Mingjiong Zhou, Hongze Liang, Jing Gong, Ya-Jun Cheng, Jie Gao, Yonggao Xia
Summary: In this study, a phosphonate-functionalized imidazolium ionic liquid (PFIL) was synthesized and used as a gel polymer electrolyte (GPE) to replace the conventional carbonate-based electrolyte solution in lithium-ion batteries. The resulting ionic liquid-based gel polymer electrolyte (IL-GPE) exhibited low crystallinity, flame retardance, and excellent electrochemical performance. IL-GPE showed high ionic conductivity and lithium-ion transference number, leading to stable cycling and improved stability in lithium cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jiapei Li, Peng Chen, Jing Zhang, Qing Ji, Ming Yang, Yudai Huang, Ya-Jun Cheng, Kunkun Guo, Yonggao Xia
Summary: The study proposes a new electrode processing approach by spin-coating a polyimide (PI) precursor on the Li[NixCoyMn1-x-y]O2 (NCM) electrode sheet, resulting in the in situ production of a homogeneous sulfonated PI layer by thermal imidization reaction. The PI-spin coated (PSC) layer improves capacity retention and rate performance as demonstrated by the NCM523-PSC||Li half cell. The NCM523-PSC||graphite pouch full cell also shows enhanced capacity retention, and the thermal safety of the NCM523-PSC cathode-based pouch cell is significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yue Yin, Tianle Zheng, Jiawei Chen, Yu Peng, Zhong Fang, Yanbing Mo, Congxiao Wang, Yonggang Wang, Yongyao Xia, Xiaoli Dong
Summary: By replacing ethylene carbonate (EC) with isoxazole (IZ) as the electrolyte component, the performance of lithium-ion batteries (LIBs) at low temperatures can be improved by reducing capacity loss and Li plating on the graphite anode.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Jintao Jia, Longping Deng, Huajian Shentu, Mengmeng Wang, Ya-Jun Cheng, Xiuxia Zuo, Jie Gao, Yonggao Xia
Summary: This research proposes a new, sustainable, and easy-to-implement process for the recycling of spent LiFePO4 cathode powder. The 732 cation exchange resin is used as a leaching agent and an adsorbent to recover Li and Fe from the waste powder. The results show that it is technically and economically feasible to use the 732 cation exchange resin for recovery, and high-purity products can be obtained.
Article
Engineering, Chemical
Hui Wang, Longhao Cao, Mengmeng Wang, Bin Liu, Longping Deng, Guohua Li, Ya-Jun Cheng, Jie Gao, Yonggao Xia
Summary: A process to recycle valuable metals from spent lithium-ion batteries (LIBs) by separating aluminum foil and cathode material is proposed. The separated aluminum foil is used as a reducing agent to generate high-purity Ni-Co-Mn nanopowders. The process achieves high recovery efficiencies of Li, Ni, Co, and Mn and transforms waste aluminum into a high-value-added reductant, greatly reducing costs and making the process green.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Tianle Zheng, Bingyin Zhu, Jianwei Xiong, Tonghui Xu, Chao Zhu, Can Liao, Shanshan Yin, Guangjiu Pan, Yuxin Liang, Xiaotang Shi, Hongbin Zhao, Ruediger Berger, Ya-Jun Cheng, Yonggao Xia, Peter Mueller-Buschbaum
Summary: A new concept of pseudo-localized-high-concentration electrolytes (PLHCE) using inexpensive lithium nitrate as the single lithium salt has been developed to improve the electrochemical performance of lithium metal batteries. The PLHCE strategy promotes the formation of an organic-inorganic composite solid electrolyte interface (SEI) layer, resulting in good mechanical properties and high coulombic efficiency for Li||Cu cells and long-term cycling for Li||Li cells. Furthermore, this approach shows excellent performance and stability in Li||LFP and Li||NCM523 cells, indicating its general applicability to different solvents as pseudo-diluents.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Yiyao Xiao, Xiaotang Shi, Tianle Zheng, Ye Yue, Siqi Shi, Ya-Jun Cheng, Yonggao Xia
Summary: Increasing the working voltage of a layered oxide cathode is an efficient way to lift the energy density of lithium-ion batteries, but it can lead to uncontrollable side reactions and excessive electrolyte decomposition. Construction of a high-voltage stable solid-electrolyte interface (SEI) layer is crucial to enhance the electrochemical performance. In this study, trimethylene borate (TMEB) was used as a borate ester additive, which improved the cycling stability of NCM523 cells at 4.5V charging cutoff voltage.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ying Ye, Yuzhe Luo, Jiatao Lou, Xuli Chen, Ya-Jun Cheng, Jianfeng Xia, Yaobang Li, Kunkun Guo
Summary: NiCo2S4@N-CNT composites with multidimensional hierarchical structures are synthesized for excellent electrochemical performances in supercapacitors. This unique structure consists of hollow spherical NiCo2S4 nanoparticles and nitrogen-doped carbon nanotubes (N-CNTs,1D) acting as conductive bridges. The assembled all-solid-state supercapacitor device achieves high energy densities of 59.37 W h kg(-1) at a power density of 750 W kg(-1) and above 45.6 W h kg(-1) at a power density of 1.5 kW kg(-1). These results provide a promising perspective for designing favorable bimetallic sulfide structures in supercapacitor applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yutao Xu, Fatima Zahra Chafi, Peng Chen, Cancan Peng, Ya-Jun Cheng, Kunkun Guo, Xiuxia Zuo, Yonggao Xia
Summary: This study proposes a new concept of using a multi-functional block copolymer PEI-b-PDMS as a binder for nickel-rich cathodes. Compared to the conventional PVDF binder, the PEMS binder is capable of inhibiting crack formation within NCM(811) particles to retard structure degradation and regulating the composition of the CEI layer. The PEMS binder also exhibits enhanced electrolyte affinity and improves the dispersion of carbon black within the electrode.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chenkun Li, Yao Xiao, Xiaosong Zhang, Hongwei Cheng, Ya-Jun Cheng, Yonggao Xia
Summary: This study presents a practical method to address the irreversible capacity loss of lithium-ion batteries during initial cycling by utilizing a Li2CO3/carbon nanocomposite as a lithium replenishment material. The nanocomposite, synthesized through high-speed ball-milling, exhibits high specific capacity and capacity retention in the initial charging cycle. By incorporating the nanocomposite in full-cells, the capacity and cycling life of the batteries are significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Liling Dai, Ziyin Guo, Zhao Wang, Shunjie Xu, Shuilong Wang, Wenlu Li, Guodong Zhang, Ya-Jun Cheng, Yonggao Xia
Summary: A surface-modified O3-type layered NaNi1/3Fe1/3Mn1/3O2 cathode with NaPO3 is synthesized, which exhibits improved high-voltage stability, cyclic stability, and rate performance through protection against acid attack and inhibition of surface parasitic reactions.
Article
Chemistry, Physical
Longhao Cao, Hui Wang, Ziyin Guo, Jing Zhang, Xiaosong Zhang, Cancan Peng, Jingxiong Yu, Ya-Jun Cheng, Yonggao Xia
Summary: A new synthetic method using cobalt metal as the precursor is proposed to in situ form LiCoO2, which shows better cycle performance and faster Li+ diffusion rate compared to the commercial synthesis method. The stable cycling performance is achieved by suppressing the order-disorder phase transition through the Co2+ pillar effect. The improved synthesis yield and compacted density of the new method offer a new strategy for the in situ synthesis of cathode materials for lithium-ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Ming Yang, Peng Chen, Jiapei Li, Ruoxuan Qi, Yudai Huang, Peter Mueller-Buschbaum, Ya-Jun Cheng, Kunkun Guo, Yonggao Xia
Summary: Silicon oxide (SiOx) is a promising anode material for high-energy lithium-ion batteries (LIBs) due to its abundant reserves, facile synthesis, and high theoretical capacity. However, its practical use is limited by poor cycling stability caused by volume change during lithiation/delithiation. The use of a waterborne poly(acrylic acid) (PAA) binder enriched with an organic solvent (DMF) improves the performance of SiOx-based anodes in terms of capacity retention and rate capacity, enabling its practical application in both half-cell and full-cell configurations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Xinyu Jiang, Alexander J. Gillett, Tianle Zheng, Xin Song, Julian E. Heger, Kun Sun, Lukas V. Spanier, Renjun Guo, Suzhe Liang, Sigrid Bernstorff, Peter Mueller-Buschbaum
Summary: The poor operational stability of organic solar cells (OSCs) limits their practical application. In this study, we investigate the active layers fabricated using different acceptors blended with a conjugated polymer donor. The morphology and stability of the active layer are found to be influenced by the pi-pi stacking characteristics, affecting the performance of the OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
