- 研究番号：24C07
- 研究分野：science
- 研究種別：奨励研究
- 研究期間：2024年04月〜2025年03月
代表研究者
スブラマニアン ナタラジャン 理工総研が募集する次席研究員
SUBRAMANIAN Natarajan Junior Researcher
理工学術院総合研究所 野田 優 研究室
Research Institute for Science and Engineering
URL：https://w-rdb.waseda.jp/html/100004125_ja.html
研究概要
My key objectives of the proposed research plan on the upcycling of the spent Li-ion battery materials are given below:
a)To upcycle Ni-lean or Ni-free cathode materials (such as LCO, LMO, or NCM 111) from spent Li-ion batteries (LIBs) into Ni-rich cathode materials suitable for use in new LIBs and All-Solid-State batteries (ASSBs).
b)To regenerate spent graphite through direct recycling and upcycling methods to produce high-capacity anodes for reuse in Li-ion batteries.
c)To evaluate the energy storage capacities of the developed LIBs with upcycled cathodes and anodes through electrochemical studies using appropriate electrolytes.
d)To assess the environmental impacts of LIB production and the recycling process through life-cycle analyses within the proposed upcycling research.
The collected spent LIBs will be dismantled manually, and the recovery of spent LIB’s cathode (NMC, LCO, or LMO) and anode (graphite) materials will be performed for reuse as LIB and ASSBs electrode materials with good capacity and performance. The key points of the proposed plan for this research are given below:
a)The cathodes (NMC, LCO, or LMO) will undergo electrochemical delithiation followed by lixiviation using either electrochemical or organic acids to facilitate their upcycling.
b)Ni-lean cathodes will be upcycled into Ni-rich NMC cathode materials utilizing recycled materials sourced from spent batteries to reuse in LIBs and ASSBs.
c)Spent graphite from the anode material will be regenerated through various techniques, including direct regeneration, to enable its reuse as high-capacity anodes in Li-ion batteries.
d)The energy storage capacities of the developed batteries incorporating the regenerated cathodes and graphite anodes will be assessed through comprehensive electrochemical studies.
